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Mathias Albert
I work on theoretical aspects of condensed matter: BoseEinstein condensation, quantum fluids, disordered systems, Anderson localisation, strongly correlated quantum mixtures and mesoscopic transport.Mathias Albert
CV of Mathias Albert
 2013 Associate professor (maitre de conference) at Institut de Physique de Nice, Universite Cote d'Azur Nice.
 201113 Post doc at Laboratoire de Physique des Solides Orsay with Ines Safi and Pascal Simon
 200911 Post at Departement de Physique Theorique de Geneve with Markus Buttiker
 200609 PhD student at Laboratoire de Physique Theorique et Modeles Statistique Orsay with Patricio Leboeuf
Publication list of Mathias Albert
ArXiv and Google scholar
Quantum gases
 M. Albert et C. A. Müller, Full distribution of the superfluid fraction and extreme value statistics in a one dimensional disordered Bose gas, Phys. Rev. A 101, 023605 (2020).
 F. T. Sant'Ana, F. Hébert, V. Rousseau, M. Albert, P. Vignolo, Scaling properties of the Tan's contact: embedding pairs and correlation effect in the Tonks limit, Phys. Rev. A 100, 063608 (2019).
 J. Decamp, M. Albert et P. Vignolo, Tan's contact in a cigarshaped dilute Bose gas, Phys. Rev. A 97, 033611 (2018)
 C. Michel, O. Boughdad, M. Albert, P.E. Larré et M. Bellec, Experimental Observation of the Drag Force Suppression in a Flow of Superfluid Light, Nature Communications 9, 2108 (2018).
 J. Decamp, J. Jünemann, M. Albert, M. Rizzi, A. Minguzzi et P. Vignolo, Strongly correlated onedimensional BoseFermi quantum mixtures : symmetry and correlations, New J. Phys. 19, 125001 (2017).
 J. Decamp, J. Jünemann, M. Albert, M. Rizzi, A. Minguzzi et P. Vignolo, Highmomentum tails as magnetic structure probes for stronglycorrelated SU(κ) fermionic mixtures in onedimensional traps, Phys. Rev. A 94, 053614 (2016).
 J. Decamp, P. Armagnat, B. Fang, M. Albert, A. Minguzzi et P. Vignolo, Exact density profiles and symmetry classication for strongly interacting multicomponent Fermi gases in tight waveguides, New J. Phys (2016).
 I. Zapata, M. Albert, R. Parentani et F. Sols, Resonant Hawking radiation in BoseEinstein condensates, New J. Phys. 13, 063048 (2011).
 M. Albert, T. Paul, N. Pavloff et P. Leboeuf, Breakdown of the superfluidity of a matter wave in a random environment, Phys. Rev. A 82, 011602(R) (2010).
 M. Albert et P. Leboeuf, Localization by bichromatic potentials versus Anderson localization, Phys. Rev. A 81, 013614 (2010).
 T. Paul, M. Albert, P. Schlagheck, P. Leboeuf et N. Pavloff, Anderson localization of a weakly interacting one dimensional Bose gas, Phys. Rev. A 80, 033615 (2009).
 M. Albert, T. Paul, N. Pavloff et P. Leboeuf, Dipole Oscillations of a BoseEinstein Condensate in the presence of Defect and Disorder, Phys. Rev. Lett. 100, 250405 (2008).
Mesoscopic physics
 P. Devillard, D. Chevallier et M. Albert, Fingerprints of Majorana fermions in current correlations measurements from a superconducting tunnel microscope, Phys. Rev. B 96 115413 (2017).
 D. Chevallier, M. Albert et P. Devillard, Probing majorana and andreev bound states with waiting times, EPL 116 27005 (2016).
 M. Albert, D. Chevallier et P. Devillard, Waiting times of entangled electrons in normalsuperconducting junctions, Physica E 76, 209 (2016).
 G. Haack, M. Albert et C. Flindt, Distributions of electron waiting times in quantumcoherent conductors, Phys. Rev. B. 90, 205429 (2014).
 M. Albert et P. Devillard, Waiting time distribution for trains of quantized electron pulses, Phys. Rev. B 90, 035431 (2014).
 K. Van Hoogdalem, M. Albert, P. Simon et D. Loss, Proposal for a quantum magnetic RC circuit, Phys. Rev. Lett. 113, 037201 (2014).
 S. Jezouin, M. Albert, F.D. Parmentier, A. Anthore, U. Gennser, A. Cavanna, I. Sa et F. Pierre, TomonagaLuttinger liquid physics in electronic quantum circuits, Nature Communication 4, 1802 (2013). .
 F. Battista, M. Moskalets, M. Albert, et P. Samuelsson, Quantum heat uctuations of single particle sources, Phys. Rev. Lett. 110, 126602 (2013).
 M. Albert, G. Haack, C. Flindt et M. Büttiker, Electron waiting times in mesoscopic conductors, Phys. Rev. Lett. 108, 186806 (2012).
 F. Parmentier et al, Current noise spectrum of a single particle emitter : theory and experiment, Phys. Rev. B 85, 165438 (2012).
 M. Albert, C. Flindt et M. Büttiker, Distribution of waiting times of dynamic single electron emitters, Phys. Rev. Lett. 107, 086805 (2011).
 M. Albert, C. Flindt et M. Büttiker, Accuracy of the mesoscopic capacitor as a single electron source, Phys. Rev. B 82, 041407(R) (2010).

Olivier Alibart
Associate professor at the Institut de Physique de NiceOlivier Alibart
My research covers the field of experimental quantum optics and its application to quantum information protocols over optics fibers. More specifically, I work at the Quantum Photonics and Information group at the Institut de Physique de Nice quantum information based on guidedwave optics and compatible with telecom fibre networks.

Médéric Argentina
Médéric Argentina ResearchMédéric Argentina
A minimal model for aquatic self propelled locomotion
J. Sanchez, C. Raufaste and M. Argentina, "A Minimal model for aquatic self propelled locomotion", submitted to JFS (2019)
Fish locomotion is a complicated problem in the context of fluidstructure interaction and it is still not understood what is linked to biology and what is linked to mechanics. Measurements performed on natural fish and artificial systems reveal that swimming at high Reynolds number is found in a narrow range of Strouhal numbers  a dimensionless combination of the swimming velocity, tail beat amplitude and frequency. With a simplified model of aquatic locomotion, we show that this number is set by a simple thrustdrag balance.
Curvature based, time delayed feedback as means of self propelled swimming
D. Gross, Y. Roux and M. Argentina, "Curvaturebased, time delayed feedback as a means for selfpropelled swimming", JFS 86, 186 (2019)
The development of bioinspired robotics has lead to an increasing need to un derstand the strongly coupled fluidstructure and control problem presented by swimming. Gazzola et al. [1] showed the possibility that a curvature based feedback with a time delay may be sufficient to generate a selfpropulsive swimmer without the need for a central pattern generator. This work seeks to show that such a feedback based selfpropulsion has different character istics than swimming developed from an imposed central pattern generator. The influence of both the feedback delay and structral damping is examined. The swimmer is modelled as a thin, EulerBernoulli beam using a finite element representation which is coupled to an unsteady boundary element method for the rsolution of the fluid problem. The model is first tested on a flexible, thin foil in forced leading edge heave. The behavior of the swimmer when given an imposed traveling bending moment wave is then presented. This is then compared to a swimmer with delayed curvaturebased feedback. Finally, a simplified model is shown to qualititatively produce the behavior in the peaks observed in the feedback swimmer
Study of the thrustdrag balance with a swimming robotic fish
F. Gibouin, C. Raufaste, Y. Bouret, and M. Argentina, "Study of the thrust–drag balance with a swimming robotic fish", POF 30, 091901 (2018)
A robotic fish is used to test the validity of a simplification made in the context of fish locomotion.<br />With this artificial aquatic swimmer, we verify that the momentum equation results from a simple balance between a thrust and a drag that can be treated independently in the small amplitude regime. The thrust produced by the flexible robot is proportional to A^2 f^2, where A and f are the respective tailbeat amplitude and oscillation frequency, irrespective of whether or not $f$ coincides with the resonant frequency of the fish.<br />The drag is proportional to U_0^2, where U_0 is the swimming velocity.<br />These three variables set the value of the Strouhal number in this regime, while for larger amplitudes, the Strouhal number increases as a result of a correction factor on the effective drag.
Shape and coarsening dynamics of strained islands
G Schifani, T Frisch, M. Argentina "Equilibrium and dynamics of strained islands, PRE 97, 062805 2018
G Schifani, T Frisch, M. Argentina & J.N. Aqua Shape and coarsening dynamics of strained islands", PRE 94, 042808, 2016.
We investigate the formation and the coarsening dynamics of islands in a strained epitaxial semiconductor film. These islands are commonly observed in thin films undergoing a morphological instability due to the presence of the elastocapillary effect. We first describe both analytically and numerically the formation of an equilibrium island using a twodimensional continuous model. We have found that these equilibrium islandlike solutions have a maximum height h0 and they sit on top of a flat wetting layer with a thickness hw . We then consider two islands, and we report that they undergo a noninterrupted coarsening that follows a two stage dynamics. The first stage may be depicted by a quasistatic dynamics, where the mass transfers are proportional to the chemical potential difference of the islands. It is associated with a time scale tc that is a function of the distance d between the islands and leads to the shrinkage of the smallest island. Once its height becomes smaller than a minimal equilibrium height h∗0, its mass spreads over the entire system. Our results pave the way for a future analysis of coarsening of an assembly of islands.
Solitarylike wave in a liquid foam microchannel
Y. Bouret, A Cohen, N. Fraysse, M. Argentina & C. Raufaste "Solitarylike waves in a liquid foam microchannel", PRF 1, 043902, 2016.
Plateau borders (PBs) are liquid microchannels located at the contact between three bubbles in liquid foams. They are stable, deformable, and can be thought of as quasi onedimensional model systems to study surface waves in fluid dynamics. We show that the burst of a bubble trapped in a PB produces local constrictions which travel along the liquid channel at constant velocity, without significant change in shape. These patterns are reminiscent of the depression solitary waves encountered in nonlinear systems. By coupling flow inertia to capillary stresses, we derive a simple model that admits solitonic solutions, which we characterized numerically and analytically in the limit of small deformation. These solutions capture most of the features observed experimentally.
Bubble dynamics inside an outgassing hydrogel confined in a HeleShaw cell
F. Haudin, X. Noblin, Y. Bouret, M. Argentina & C. Raufaste "Bubble dynamics inside an outgassing hydrogel confined in a HeleShaw cell", PRE 94, 023109, 2016.
We report an experimental study of bubble dynamics in a nonNewtonian fluid subjected to a pressure decrease. The fluid is a hydrogel, composed of water and a synthetic clay, prepared and sandwiched between two glass plates in a HeleShaw geometry. As the imposed pressure decreases, the gas initially dissolved in the hydrogel triggers bubble formation. Different stages of the process are observed: bubble nucleation, growth, interaction, and creation of domains by bubble contact or coalescence. Initially bubble behave independently. They are trapped and advected by the mean deformation of the hydrogel, and the bubble growth is mainly driven by the diffusion of the dissolved gas through the hydrogel and its outgassing at the reactiveadvected hydrogelbubble interface. A model is proposed and gives a simple scaling that relates the bubble growth rate and the imposed pressure.
Gait and speed selection in slender inertial swimmers
M. Gazzola, M. Argentina & L. Mahadevan, "Gait and speed selection in slender inertial swimmers", PNAS, doi:10.1073/pnas.1419335112, 2015.
Inertial swimmers use flexural movements to push water and generate thrust. We quantify this dynamical process for a slender body in a fluid by accounting for passive elasticity and hydrody namics and active muscular force generation and proprioception. Our coupled elastohydrodynamic model takes the form of a non linear eigenvalue problem for the swimming speed and locomo tion gait. The solution of this problem shows that swimmers use quantized resonant interactions with the fluid environment to enhance speed and efficiency. Thus, a fish is like an optimized diode that converts a prescribed alternating transverse motion to forward motion. Our results also allow for a broad comparative view of swimming locomotion and provide a mechanistic basis for the empirical relation linking the swimmer’s speed U, length L, and tail beat frequency f, given by U=L ∼ f [Bainbridge R (1958) J Exp Biol 35:109–133]. Furthermore, we show that a simple form of proprioceptive sensory feedback, wherein local muscle activation is function of body curvature, suffices to drive elastic instabilities associated with thrust production and leads to a spontaneous swimming gait without the need for a central pattern generator. Taken together, our results provide a simple mechanistic view of swimming consistent with natural observations and suggest ways to engineer artificial swimmers for optimal performance.
Onedimensional capillary jumps
M. Argentina, A. Cohen, Y. Bouret, N. Fraysse & C. Raufaste "One dimensional capillary jumps", J.F.M., 765, 116, 2015
In flows where the ratio of inertia to gravity varies strongly, large variations in the fluid thickness appear and hydraulic jumps arise, as depicted by Rayleigh. We report a new family of hydraulic jumps, where the capillary effects dominate the gravitational acceleration. The Bond number – which measures the importance of gravitational body forces compared to surface tension – must be small in order to observe such objects using capillarity as a driving force. For water, the typical length should be smaller than 3 mm. Nevertheless, for such small scales, solid boundaries induce viscous stresses, which dominate inertia, and capillary jumps should not be described by the inertial shock wave theory that one would deduce from Bélanger or Rayleigh for hydraulic jumps. In order to get rid of viscous shears, we consider Plateau borders, which are the microchannels defined by the merging of three films inside liquid foams, and we show that capillary jumps propagate along these deformable conduits. We derive a simple model that predicts the velocity, geometry and shape of such fronts. A strong analogy with Rayleigh’s description is pointed out. In addition, we carried out experiments on a single Plateau border generated with soap films to observe and characterize these capillary jumps. Our theoretical predictions agree remarkably well with the experimental measurements.
Scaling macroscopic aquatic locomotion
M . Gazzola, M. Argentina & L. Mahadevan, "Scaling macroscopic aquatic locomotion", Nature Physics, 10, 758, 2014
Inertial aquatic swimmers that use undulatory gaits range in length L from a few millimetres to 30metres, across a wide array of biological taxa. Using elementary hydrodynamic arguments, we uncover a unifying mechanistic principle characterizing their locomotion by deriving a scaling relation that links swimming speed U to body kinematics (tail beat amplitude A and frequency f) and fluid properties (kinematic viscosity nu). This principle can be simply couched as the power law Re⇠Sw^a, where Re = UL/v 1 and Sw = AwL/v, with a= 4/3 for laminar flows, and a = 1 for turbulent flows. Existing data from over 1,000 measurements on fish, amphibians, larvae, reptiles, mammals and birds, as well as direct numerical simulations are consistent with our scaling. We interpret our results as the consequence of the convergence of aquatic gaits to the performance limits imposed by hydrodynamics.
The fern cavitation catapult: mechanism and design principles
C. Llorens, M. Argentina, N. Rojas, J. Westbrook, J. Dumais, X. Noblin, "The fern cavitation catapult: mechanism and design principles", Interface 13, 114, 20150930, 2016.
Leptosporangiate ferns have evolved an ingenious cavitation catapult to disperse their spores. The mechanism relies almost entirely on the annulus, a row of 1225 cells which successively: i) stores energy by evaporation of the cell content, ii) triggers the catapult by internal cavitation and, iii) controls the time scales of energy release to ensure efficient spore ejection. Here we study in detail the three phases of spore ejection in the sporangia of the fern Polypodium aureum. We show first that the geometry of the cells is particularly well suited to induce bending deformations of the annulus thus allowing the sporangium to work as a catapult. We then present experiments that allowed us to measure the key parameters for each phase of the ejection. These experiments point to a critical cavitation pressure of approximately. We also quantified the parameters that set the short and long time scales of the closing phase.
Inertial transport in foams
CA. Cohen, N. Fraysse, J. Rajchenbach, M. Argentina, Y. Bouret & C. Raufaste, "Inertial Mass Transport and Capillary Hydraulic Jump in a Liquid Foam Microchannel", Phys. Rev. Lett. 112, 218303, 2014
We report a new family of hydraulic jumps, where the capillary effects dominate the gravitational acceleration. In flows where the ratio inertia to gravity vary, strong variations in the fluid thickness appear and hydraulic jumps arise. In order to observe such objects using capillary as a driving force, the Bond number which measures the importance of surface tension to gravitation body forces must be small. ForÂ water, the typical length should be smaller than 3 mm. Nevertheless, for such small scales, solid boundaries induce viscous stresses which dominate inertia and capillary jump shall not be described by the shock wave theory introduced by Rayleigh for hydraulic jumps. In this study, we describe the capillary jumps travelling in Plateau borders, which are channels defined by the merging of three films inside foam. We derive a simple model which predicts the velocity, the geometry and the shape of such fronts. In this approach, we point out a strong analogy with Rayleigh's description. We carried out experiments with soap films to observe and characterize these hydraulic jumps mediated by capillarity. Our theoretical predictions are in great agreement with the experiences.
Capturing intracellular pH dynamics by coupling its molecular mechanisms
Y. Bouret, M. Argentina, L. Counillon Capturing Intracellular pH Dynamics by Coupling Its Molecular Mechanisms within a Fully Tractable Mathematical Model. PLoS ONE 9(1): e85449. 2014.
We describe the construction of a fully tractable mathematical model for intracellular pH. This work is based on the individual coupling of the kinetic equations depicting the molecular mechanisms for pumps, transporters and chemical reactions, which determine this parameter in eukaryotic cells. Thus, our system also calculates the membrane potential and the cytosolic ionic composition. Such a model required the development of a novel algebraic method that couples differential equations for slow relaxation processes to steady state equations for fast chemical reactions. Compared to classical heuristic approaches based on fitted curves and adhoc constants, this yields significant improvements. This model is mathematically selfconsistent and allows for the first time to establish analytical solutions for steady state pH and a reduced differential equation for pH regulation. Because of its modular structure, it can integrate any additional mechanism that will directly or indirectly affect pH. In addition, it provides mathematical clarifications for widely observed biological phenomena such as overshooting in regulatory loops.
Personalized forecast decreases the number of unnecessary ICD implantations threefold
Argentina M, Krinski V, Guberman S, Zabel M, Sacher F, Napolitano C, Priori S, Hasenfuß G, Haïssaguerre M, Luther S.
We aim at developing new and efficient approaches to treat the two related problems: 90% of victims of sudden cardiac death (SCD) were not protected by ICD. B. 9095% patients (Pts) are implanted with ICD. They do NOT need at that time and 70% will not need it in the next 5 years. No satisfactory results are reported to decrease the number of unnecessary ICD implantations and to use liberated ICDs to protect pts from SCD. We created a personalized forecast for every pt based on the standard measurements performed by a cardiologist before the ICD implantation. The personalized forecast decreases 23 fold the number of unnecessary ICD implantations for consecutive infarct survivors.
The fern sporangium: a unique catapult
X. Noblin, N. Rojas , J. Westbrook, C. llorens, M.Argentina & J. Dumais, "The fern sporangium: a unique catapult”, Science, 335, 1322, 2012
Various plants and fungi have evolved ingenious devices to disperse their spores. One such mechanism is the cavitationtriggered catapult of fern sporangia. The spherical sporangia enclosing the spores are equipped with a row of 12 to 13 specialized cells, the annulus. When dehydrating, these cells induce a dramatic change of curvature in the sporangium, which is released abruptly after the cavitation of the annulus cells. The entire ejection process is reminiscent of humanmade catapults with one notable exception: The sporangia lack the crossbar that arrests the catapult arm in its returning motion. We show that much of the sophistication and efficiency of the ejection mechanism lies in the two very different time scales associated with the annulus closure.
A dynamical model of the Utricularia trap
C. llorens, M. Argentina, Y. Bourret, P. Marmottant & O. Vincent, "A dynamical model of the Utricularia trap”, Interface, 9, 31293139, 2012
We propose a model that captures the dynamics of a carnivorous plant,Utricularia inflata. This plant possesses tiny traps for capturing small aquatic animals. Glands pump water out of the trap, yielding a negative pressure difference between the plant and its surround ings. The trap door is set into a metastable state and opens quickly as an extra pressure is generated by the displacement of a potential prey. As the door opens, the pressure difference sucks the animal into the trap. We write an ODE model that captures all the physics at play. We show that the dynamics of the plant is quite similar to neuronal dynamics and we analyse the effect of a white noise on the dynamics of the trap.
Quasipatterns in parametrically forced thin films
M. Argentina & G. Iooss, "Quasipatterns in parametrically forced thin films”, Physica D, 241, issue 16, 13061321, 2012
We shake harmonically a thin horizontal viscous fluid layer (frequency forcing , only one harmonic), to reproduce the Faraday experiment and using our previously derived system invariant under horizontal rotations. When the physical parameters are suitably chosen, there is a critical value of the amplitude of the forcing such that instability occurs with at the same time the mode oscillating at half the same frequency forcing. We give simple necessary conditions on coefficients, for obtaining the bifurcation of (formally) stable timeperiodic quasipatterns.
An elasto hydrodynamical model of friction for the locomotion of Caenorhabditis elegans
P. Sauvage, M. Argentina, J. Drappier, T. Senden, J. Siméon and J.M. di Meglio “An elasto hydrodynamical model of friction for the locomotion of Caenorhabditis elegans ”, Journal of Biomechanics 44, 6, 11171122, 2011.
Caenorhabditis elegans (C. elegans) is one of the most studied organisms by biologists. Composed of around one thousand cells, easy to culture and to modify genetically, it is a good model system to address fundamental physiological questions and in particular to investigate neuromuscular processes. Many C. elegans mutants can be distinguished by their locomotion phenotype and it then important to understand the biomechanics of their locomotion and in particular the mechanics of their undulating crawling motion on agar aqueous gels where they are commonly grown and observed. In this article, we present a mechanical model of the friction of the worms on their substrate where we have included capillarity (which pins the worm of the gel), the hydrodynamics of the lubrication film (between worm and gel) and the substrate/body elasticity. We determine the ratio of the transverse to longitudinal friction coefficients of the worm body on the culture gel as a function of a control parameter which describes the relative role of the deformation of the gel and the viscous dissipation in the lubrication film. Experimentally this ratio is – for soft gels – larger than the maximal value predicted by our model (this maximum is equal to 2, the value for an infinite cylinder in bulk liquid) and we propose to include the plasticity of the gel (i.e. the dissipation of the deformation of the gel) for a better description of the worm/gel interaction.
Faraday patterns in lubricated thin films
N. Rojas , M. Argentina , E. Cerda & E. Tirapegui, “Faraday patterns in lubricated thin films”, EJPD, 62, 1, 2531, 2011.
We shake harmonically a thin horizontal viscous fluid layer (frequency forcing , only one harmonic), to reproduce the Faraday experiment and using our previously derived system invariant under horizontal rotations. When the physical parameters are suitably chosen, there is a critical value of the amplitude of the forcing such that instability occurs with at the same time the mode oscillating at half the same frequency forcing. We give simple necessary conditions on coefficients, for obtaining the bifurcation of (formally) stable timeperiodic quasipatterns.
Dynamics of a bouncing ball on a vibrated elastic membrane
B. Eichwald, M. Argentina, X. Noblin, F. Celestini, “Dynamics of a bouncing ball on a vibrated elastic membrane”, Phys. Rev. E 82, 016203, 2010.
We investigate the dynamics of a ball bouncing on a vibrated elastic membrane. Beyond the classical solidsolid case, we study the effect of introducing new degrees of freedom by allowing substrate oscillations. The forcing frequency of the vibration strongly influences the different thresholds between the dynamical states. The simple model proposed gives good agreement between the experiments and the analytical expres sion for the threshold at which the ball begins to bounce. Numerical simulations permit to qualitatively recover the experimental phase diagram. Finally, we discuss how this simple system can give new insights in the recent experimental studies on bouncing droplets.
Inertial Lubrication theory
N. Rojas , M. Argentina , E. Cerda & E. Tirapegui, “Inertial Lubrication theory”, Phys. Rev. lett. 104, 18780, 2010.
Thin fluid films can have surprising behavior depending on the boundary conditions enforced, the energy input and the specific Reynolds number of the fluid motion. Here we study the equations of motion for a thin fluid film with a free boundary and its other interface in contact with a solid wall. Although shear dissipation increases for thinner layers and the motion can generally be described in the limit as viscous, inertial modes can always be excited for a sufficiently high input of energy. We derive the minimal set of equations containing inertial effects in this strongly dissipative regime.
Wavetraininduced termination of weakly anchored vortices in excitable media
Alain Pumir, Sitabhra Sinha, S. Sridhar, M. Argentina, Marcel Horning, Simonetta Filippi, Christian Cherubini, Stefan Luther, and Valentin Krinsky, ”Wavetraininduced termination of weakly anchored vortices in excitable media”, Phys. Rev. E 81, 010901, 2010.
A free vortex in excitable media can be displaced and removed by a wave train. However, simple physical arguments suggest that vortices anchored to large inexcitable obstacles cannot be removed similarly. We show that unpinning of vortices attached to obstacles smaller than the core radius of the free vortex is possible through pacing. The wavetrain frequency necessary for unpinning increases with the obstacle size and we present a geometric explanation of this dependence. Our modelindependent results suggest that decreasing excitability of the medium can facilitate pacinginduced removal of vortices in cardiac tissue.
Robert Hooke’s Three Body problem
M. Argentina, P. Coullet, JM Gilli, M Monticelli & G Rousseaux ”Modern chaos in the ancient experiments of Robert Hooke on the inverted cone. ”, Proc. Roy. Soc. 453, 12591269, 2007.
During the winter 1679, R. Hooke challenged I. Newton to predict the dynamics of an object submitted to a constant radial force. This correspondence influenced strongly I. Newton, that wrote four years later its "De Motu", real ancestor of "The Principia", published in 1687. R. Hooke's problem can be physically linked to the dynamics of a sphere sliding on an inverted cone due to gravitational effects. If the symmetry axis of the cone is parallel to the gravitational field, the ball executes stable precessions. Breaking this symmetry induces the appearance of chaotic motions. After having derived the equations related to the position of the sphere, we analyze its dynamics, and we perform an approximated Floquet analysis that is compared to our numerical results.
Taylorlike Vortices in ShearBanding Flow of Giant Micelles
M. A. Fardin, B. Lasne, O. Cardoso, G. Grégoire, M. Argentina, J. P. Decruppe, and S. Lerouge “Taylorlike Vortices in ShearBanding Flow of Giant Micelles”, Phys. Rev. Lett. 103, 028302, 2009.
Using flow visualizations in Couette geometry, we demonstrate the existence of Taylorlike vortices in the shearbanding flow of a giant micelles system. We show that vortices stacked along the vorticity direction develop concomitantly with interfacial undulations. These cellular structures are mainly localized in the induced band and their dynamics is fully correlated with that of the interface. As the control parameter increases, we observe a transition from a steady vortex flow to a state where pairs of vortices are continuously created and destroyed. Normal stress effects are discussed as potential mechanisms driving the threedimensional flow.
Nonlinear Faraday Waves at Low Reynolds Numbers
N. Rojas , M. Argentina , E. Cerda & E. Tirapegui, “Nonlinear Faraday Waves at Low Reynolds Numbers”, J. Mol. Liqu. 147, 166, 2009.
Faraday waves are nonlinear oscillations that appear on the surface of a fluid which is vertically and periodically accelerated. This phenomenon has been extensively studied in the last decades. Experiments show plenty of structures such as squares, rhomboids, hexagons, quasipatterns, solitary waves and transition to spatiotemporal chaos. Theoretical studies have been devoted to the linear analysis in viscous fluids, amplitude equations in the weakly nonlinear regime and phenomenological models.
A linearized model has been derived from the Navier– Stokes equations, but the nonlinear saturation is not addressed. In this work, we derive the nonlinear equations that govern the phenomena for thin films of viscous fluids at low Reynolds number. We show that the linear Mathieu equation is contained in our model and for highly viscous fluids, we get the Reynolds equation.Settling and swimming of flexible fluidlubricated foils
M.Argentina, J.Skotheim & L.Mahadevan“Settling and swimming of flexible fluidlubricated foils”, Phys. Rev. Lett. 99, 224503, 2007.
We study the dynamics of a flexible foil immersed in a fluid and moving close to a rigid wall. Lubrication theory allows us to derive equations of motion for the foil and thus examine the passive settling and the active swimming of a foil. This also allows us to partly answer the longstanding question in cartoon physics—can carpets fly? Our analysis suggests a region in parameter space where one may realize this dream and move the virtual towards reality.
Interface Instability in ShearBanding Flows
S. Lerouge, M. Argentina, J. P. Decruppe. ”Interface Instability in ShearBanding Flow”, Phys. Rev. Lett. 96, 088301, 2006.
We report on the spatiotemporal dynamics of the interface in shearbanding flow of a wormlike micellar system (cetyltrimethylammonium bromide and sodium nitrate in water) during a startup experiment. Using the scattering properties of the induced structures, we demonstrate the existence of an instability of the interface between bands along the vorticity direction. Different regimes of spatiotemporal dynamics of the interface are identified along the stress plateau. We build a model based on the flow symmetry which qualitatively describes the observed patterns.
Coarsening dynamics of the onedimensional CahnHilliard model
M.Argentina, M.Clerc, R.Rojas & E.Tirapegui.”Coarsening dynamics of the onedimensional CahnHilliard model”, PRE 71, 046210, 2005.
The dynamics of onedimensional CahnHilliard model is studied. The stationary and particletype solutions, the bubbles, are perused as a function of initial conditions, boundary conditions, and system size. We charac terize the bubble solutions which are involved in the coarsening dynamics and establish the bifurcation scenarios of the system. A set of ordinary differential equation permits us to describe the coarsening dynamics in very good agreement with numerical simulations. We also compare these dynamics with the bubble dynam ics deduced from the classical kink interaction computation where our model seems to be more appropriated. In the case of two bubbles, we deduce analytical expressions for the bubble’s position and the bubble’s width. Besides, a simple description of the ulterior dynamics is presented.
Fluidflow induced flutter of a flag
M. Argentina & L. Mahadevan, “Fluidflow induced flutter of a flag”, PNAS 102, 6, 1829 1834, 2005.
We give an explanation for the onset of fluidflowinduced flutter in a flag. Our theory accounts for the various physical mechanisms at work: the finite length and the small but finite bending stiffness of the flag, the unsteadiness of the flow, the added mass effect, and vortex shedding from the trailing edge. Our analysis allows us to predict a critical speed for the onset of flapping as well as the frequency of flapping. We find that in a particular limit correspond ing to a lowdensity fluid flowing over a soft highdensity flag, the flapping instability is akin to a resonance between the mode of oscillation of a rigid pivoted airfoil in a flow and a hingedfree elastic plate vibrating in its lowest mode.
On the back fire instability
M. Argentina, O. Rudzick, & M. G. Velarde, “On the back fire instability”, Chaos 14, 777, 2004.
In spatially extended dynamical systems, the transition from complex behavior to ordered state may be under stood in terms of synchronization. Here we focus atten tion on the particular case of synchronization of oscilla tions in a onedimensional spatially extended system when an external resonant signal is injected. An example is an array of lasers submitted to an external electric field whose frequency is close to the selfoscillation of the units. Thus, we investigate the evolution of a nonlinear oscillatory medium submitted to a resonant signal. In the model equation describing the onset of the 1:1 paramet ric resonance, the backfiring instability is observed. This instability appears when a localized propagating pulse becomes unstable and splits into two new counterpropa gating solutions that upon an eventual collision disappear due to dissipation.
FalknerSkan approximation for gradually variable flows
M. Argentina & E. Cerda, “FalknerSkan approximation for gradually variable flows” Non Linear Phenomena and Complex systems, 9, 87, 2004.
We discuss here a method for computation of gradually variable laminar flows for large Reynold number. The model consists in approximating locally the flow with self similar profiles. This approach permits a derivation of two coupled ordinary dif ferential equations. One of them is the FalknerSkan equation with specific bound ary conditions that once solved permits to study variable flows in quite different problems or geometries. We apply the model to the problem of the Poiseuille flow, and compare it with the solution obtained by integrating directly the fluid motion equation.
Saddlenode bifurcation : Appearance mechanism of pulses in the subcritical complex GinzburgLandau equation
O. Descalzi, M. Argentina, & E. Tirapegui. “Saddlenode bifurcation : Appearance mechanism of pulses in the subcritical complex GinzburgLandau equation”, Phys. Rev. E. 67. 015501(R), 2003.
We study stationary, localized solutions in the complex subcritical GinzburgLandau equation in the region where there exists coexistence of homogeneous attractors. Using a matching approach, we report on the fact that the appearance of pulses are related to a saddlenode bifurcation. Numerical simulations are in good agreement with our theoretical predictions.
VanderWaals transition in fluidized granular media
M. Argentina, M. Clerc, & R. Soto, “VanderWaals transition in fluidized granular media” NonLinear Phenomena and Complex Systems, 9, 341, 2004.
A phase separation of fluidized granular matter is presented. Molecular dynamics simulations of a system of grains in two spatial dimensions, with a vibrating wall and without gravity, exhibit the ap pearance, coalescence, and disappearance of bubbles. By identifying the mechanism responsible for the phase separation, we show that the phenomenon is analogous to the spinodal decomposition of the gas liquid transition of the van der Waals model. We have deduced a macroscopic model for the onset of phase separation which agrees quite well with molecular dynamics simulations.
Stationary localized solution in the subcrtitical complex GinzBurgLandau equation
O. Descalzi, M. Argentina & E. Tirapegui. “Stationary localized solution in the subcrtitical complex GinzBurgLandau equation”, Int. J. Bif. Chaos 12, 11, 24592465, 2002.
It is shown that pulses in the complete quintic onedimensional Ginzburg–Landau equation with complex coefficients appear through a saddlenode bifurcation which is determined analytically through a suitable approximation of the explicit form of the pulses. The results are in excellent agreement with direct numerical simulations.
Periodic Nucleation solutions in the real Ginzburg Landau equation in finite box
M.Argentina, O.Descalzi & E.Tirapegui. “Periodic Nucleation solutions in the real Ginzburg Landau equation in finite box”, Int. J. Bif. Chaos 12, 10, 22192228, 2002.
We study the stationary solutions of the real Ginzburg–Landau equation with periodic boundary conditions in a finite box. We show explicitly how to construct nucleation solutions allowing transitions between stable plane waves.
Self parametric instability in extended systems
M. Argentina, P. Coullet & E. Risler, “Self parametric instability in extended systems”, Phys. Rev. Lett. 86, 807, 2001.
Bifurcations which occur in one parameter families of dynamical systems play an important role in the under standing of universal physical phenomena [1]. In this Let ter we report on the existence of a new type of instability which arises in spatially extended systems. We name it “selfparametric” instability since it is the consequence of anharmonicity of a spatially homogeneous limit cycle which acts as a parametric forcing on itself. More precisely we consider a partial differential equation which possesses a spatially independent timeperiodic solution. This solu tion is assumed to be stable with respect to homogeneous perturbations. We demonstrate that this solution is generi cally unstable in respect to inhomogeneous perturbations, when it approaches an Andronov homoclinic bifurcation.
A simple generalized excitability model mimicking salient features of neurons dynamics
A. Giaquinta, M. Argentina & M. G. Velarde, “A simple generalized excitability model mi micking salient features of neurons dynamics”, J. Stat. Phys. 101, (1/2), 665678, 2000.
A generalization of the FitzHughNagumo model for excitability is provided to account for salient features of Inferior Olive neurons. The base state is a limit cycle and excitability appears as spiking over peaks of the oscillations. The response of the model to various types of external stimulus is also presented. In particular, we show the relevance of an appropriate balance between amplitude and duration of the stimulus.
Headon collisions of waves in an excitable FitzHughNagumo system: a transition from wave annihilation to classical wave behavior
M. Argentina, P. Coullet & V. Krinsky, “Headon collisions of waves in an excitable FitzHugh Nagumo system: a transition from wave annihilation to classical wave behavior”, J. Theor. Biol. 205, 4752, 2000.
For the particular case of an excitable FitzHughNagumo system with diffusion, we investigate the transition from annihilation to crossing of the waves in the headon collision. The analysis exploits the similarity between the local and the global phase portraits of the system. We find that the transition has features typical of the nucleation theory of firstorder phase transitions, and may be understood through purely geometrical arguments. In the case of periodic boundary conditions, the transition is an infinitedimensional analog of the creation and the vanishing of limit cycles via a homoclinic Andronov bifurcation. Both before and after the transition, the behavior of a single cell continues to be typical for excitable systems: a stable equilibrium state, and a threshold above which an excitation pulse can be induced. The generality and qualitative character of our argument shows that the phenomenon described can be observed in excitable systems well beyond the particular case presented here.
Andronov Bifurcation and seashell patterns
M. Argentina & P. Coullet, “Andronov Bifurcation and seashell patterns”, Pattern Formation in Biology, Vision and Dynamics, Eds. A. Carbone, M. Gromov and Prusinkiewicz, World Scientific, 2000.
Tropical molluscs exhibit very complex pigmentation on their shells. In this paper, we intend to show that some of those patterns can be understood as the instability of limit cycles in spatially extended dynamical systems.
Chaotic nucleation of metastable domains
M. Argentina & P. Coullet, “Chaotic nucleation of metastable domains”, Phys. Rev. E 56, 3, R2359R2362, 1997.
We describe a cavitation process that consists of chaotic nucleation of metastable domains. It can be generically observed in spatially extended nonequilibrium systems, whenever they exhibit bistability between a stationary and an oscillatory state, close to the Andronov homoclinic bifurcation, which leads to the disap pearance of the former. In the bistable regime, the modulational instability of the homogenenous oscillations leads to inhomogenous nucleation of the stationary phase.
Colliding waves in a model excitable medium: preservation, annihilation and bifurcation
M. Argentina, P. Coullet & L. Mahadevan, Colliding waves in a model excitable medium: preservation, annihilation and bifurcation, Phys. Rev. Lett. 79, 28032807,1997.
We analyze the transition from annihilation to preservation of colliding waves. The analysis exploits the similarity between the local and global phase portraits of the system. The transition is shown to be the infinitedimensional analog of the creation and annihilation of limit cycles in the plane via a homo clinic Andronov bifurcation, and has parallels to the nucleation theory of firstorder phase transitions.

Stéphane Barland
Stéphane Barland
Stéphane Barland

Sandra Bosio
Sandra Bosio
Responsable du Service Mécanique
Je suis responsable du Service Mécanique de l'INPHYNI : Bureau d'étude et Atelier. Je conçois et réalise des prototypes pour le développement et l’innovation des projets scientifiques au sein de l'institut spécialisé dans la physique.
Le service mécanique réalise également des travaux pièces et prototypes pour d’autres Laboratoires de l’Université Nice Côte d’Azur comme par exemple pour l’IBV et l’INC.
Mes connaissances en Microtechniques me permettent de développer le micro usinage au sein du service afin d’apporter une compétence spécifique nécessaire aux équipes de recherche.J'ai pour mission :
 Manager la planification des demandes internes et externes,
 Réaliser des études mécaniques,
 Conseiller sur les moyens et solutions techniques,
 Concevoir et réaliser les pièces et prototypes,
 Gérer le budget et les commandes,
 Mettre en place une démarche qualité,
 Contrôler les pièces et prototypes,
 Appliquer et faire respecter les règles de sécurité,
 Valoriser les compétences et les savoirfaire,
 Assurer la gestion et le pilotage des projets.
Assistant de Prévention
La Formation suivi par alternance Responsable Qualité Sécurité Environnement – RQSE et le futur déménagement de l'institut est l’opportunité pour l'INPHYNI de mettre en place le Système de Management de la Sécurité et de l’Environnement.
La mise en place de ce système s’effectue par le développement de projets Hygiène & Sécurité.Le Système de Management Sécurité Environnement s’appuie sur la réglementation, l'INPHYNI à 2 tutelles le CNRS et l’Université Nice Côte d'Azur.
Le CNRS en tant qu’organisme de recherche – EPST est soumis à la Loi n° 82610 du 15 juillet 1982 pour la recherche et le développement technologique de la France.
Étant hébergé sur le site Universitaire de Nice – EPSCP, il est également soumis à la circulaire du 3 septembre 84 du ministre de l’éducation nationale : les règles de sécurité dans les établissements universitaires, ainsi qu’au code du travail.Toute cette réglementation implique la mise en place :
– Document Unique,
– Fiches individuelles d’exposition,
– Registre SST,
– Moyens de prévention concernant l’incendie,
– Registre Hygiène & Sécurité,
– Registre des dangers graves et imminents, etc… 
Massimo Giudici
Massimo Giudici
Massimo Giudici
News
 ANR BLASON Web Site
 3 December 2018: Welcome to Adrian Bartolo, ANR "Blason" Ph.D student
 1314 November 2018: LIA "Solace" Meeting in Glasgow
 56 November 2018: ANR Blason Kick off meeting in Montpellier
 2 October 2018:"Temporal localized structures in modelocked VECSELs" accepted in Optics Letters
 1 October 2018: Welcome to Alexis Verschelde, Ph.D student on Frequency Swept Sources
 ANR Project Blason (Light Bullets in Semiconductor Lasers) has been selected for funding
 Invited Talk @ Dynamics Days, Loughborough, 37 September 2018
 Photonics, Quantum and Non Linear Optics Workshop in Nice (1820 June 2018)
 Invited Talk @ 18th International Conference on Laser Optics, St. Petersburg, Russia, 48 Juin 201
Research
Activities and Collaborations
 Localized Structures in Semiconductor Lasers (in collaboration with J. Javaloyes, UIB Spain and A. Garnache, IES Montpellier)
 Frequency Swept Sources (in collaboration with G. Huyet)
 Metasurfaces for Novel Optical devices (in collaboration with P. Genevet)
Recent Publications
 Temporal localized structures in modelocked vertical externalcavity surfaceemitting lasers; Optics Letters 43, 5367, (2018)
 Non locality induces chains of nested Dissipative Solitons, Phys. Rev. Lett. 119, 033904 (2017)
 Temporal Localized Structures in optical resonators, Advances in Physics: X, 2, 496517 (2017)
 Electrical addressing and temporal tweezing of localized pulses in passivelymodelocked semiconductor lasers, Phys. Rev. A 94, 063854 (2016)
 Dynamics of Localized Structures in Systems with Broken Parity Symmetry, Phys. Rev. Lett. 116, 133901 (2016)
 Control and Generation of Localized Pulses in Passively ModeLocked Semiconductor Lasers IEEE JSTQE 21, 1101210 (2015)
 Vectorial dissipative solitons in verticalcavity surfaceemitting lasers with delays, Nature Photonics 9, 450–455 (2015), doi:10.1038/nphoton.2015.92
 Passive ModeLocking and Tilted Waves in BroadArea Vertical Cavity Surface Emitting Lasers, IEEE JSTQE 21, 1100609, (2015)
 How Lasing Localized Structures Evolve out of Passive Mode Locking, Phys. Rev. Lett. 112, 223901 (2014)
Projects
 ANR PRC « Balles de Lumiere dans les Lasers à Semiconducteurs (BLASON) », Principal Investigator
 Projet Emploi Jeune Doctorant Région UCA/PACA 2018 « Sources Lasers Innovantes pour la tomographie par cohérence optique », Partner
 Projet APO Région PACA 2016 « Contrôle de la lumière laser par des Métasurfaces (COMETA) », Partner
 Partenaire Emploi Jeune Doctorant Région CNRS/PACA 2016 « Intégration de dispositifs optiques à base de métasurfaces pour des applications en optoélectronique et contrôle de l'émission laser », Partner
Students
 A. Bartolo Nov. 2018
 A. Verschelde (codirection G. Huyet) Nov. 2018
 M. Ferraro (codirection P. Genevet) Dec. 2016
 P. Camelin Oct. 2014  Dec. 2017

William Guerin
William Guerin
William Guerin
CNRS researcher in the coldatom team
Research interests
Main current projects:
 Intensity correlations for astrophysics (since 2015)
 Cooperative scattering of light in cold atoms (since 2013)
Past projects:
 Random laser in cold atoms (20072016)
 Photonic properties of ordered cold atoms: band gaps and DFB laser (20102012)
 Lévy flights of light in hot vapors (20082009)
 BoseEinstein condensation and atom laser (20032007)
Brief CV
Born 1^{st} November 1980
Education
 2007: PhD in physics, Université ParisSud (Orsay, France). Supervisor: Alain Aspect.
 2003: Master degree "Optics and photonics", Université ParisSud (Orsay, France).
 2003: Engineering degree from Institut d’Optique (Palaiseau, France).
 1998: Baccalauréat (High school degree), science major.
Employment
 Since Oct. 2012: CNRS Research Associate at INPHYNI (formerly INLN).
 Jan. 2010 – Aug. 2012: Postdoc (project leader) at Tübingen University (Germany) in the group of Claus Zimmermann. Fellow of the Alexander von Humboldt Foundation.
 June 2007 – Sept. 2009: Postdoc at INLN in the group of Robin Kaiser.
 Oct. 2003 – May 2007: PhD student at Institut d'Optique (Palaiseau, France) in the group of Alain Aspect and Philippe Bouyer.
Grants (personal or as PI)
 2018: Research grant of Fédération Doeblin, project "Synchronization between distant sites for intensity correlation measurements in astrophysics" (4.5 k€).
 2017: Research grant of Université Côte d'Azur (IDEX), project "Intensity Correlations: from Atoms to Stars" (28 k€).
 2014: Research grant of Université Nice SophiaAntipolis (CSI), project "Subradiance in Cold Atoms with Disorder" (5 k€).
 2012: Postdoc grant of the Carl Zeiss Foundation (160 k€ for two years). I declined to take the CNRS position.
 2009: Postdoc grant of the Alexander von Humboldt Foundation (two years: 2010 – 2011).
 2003: PhD grant of the DGA (three years: 2003 – 2006).
Publications
For citation data, see my Publons page.
Quick links to publication years: 2020, 2019, 2018, 2017, 2016, 2015, 2014, 2013, 2012, 2011, 2010, 2009, 2008, 2007, 2006, 2005
Submitted
 A comparison of g^{(1)}(t), g^{(3/2)}(t) and g^{(2)}(t) for monomode chaotic radiation
A. Siciak, M. Fouché, W. Guerin, R. Kaiser, L. A. Orozco
Preprint: coming soon  Connecting field and intensity correlations: the Sieget relation and how to test it
D. Ferreira, R. Bachelard, W. Guerin, R. Kaiser, M. Fouché
Preprint: arXiv:2002.05425
 Intensity interferometry of P Cygni in the Hα emission line: towards distance calibration of LBV supergiant stars
J.P. Rivet, A. Siciak, E. S. G. de Almeida, F. Vakili, A. Domiciano de Souza, M. Fouché, O. Lai, D. Vernet, R. Kaiser, W. Guerin
Mon. Not. Roy. Astron. Soc. 494, 218 (2020), preprint: arXiv:1910.08366  Opticaldepth scaling of light scattering from a dense and cold atomic ^{87}Rb gas
K. J. Kemp, S. J. Roof, M. D. Havey, I. M. Sokolov, D. V. Kupriyanov, W. Guerin
Phys. Rev. A 101, 033832 (2020), preprint: arXiv:1807.10939  Collective excitation dynamics of a coldatom cloud
T. S. do Espirito Santo, P. Weiss, A. Cipris, R. Kaiser, W. Guerin, R. Bachelard, J. Schachenmayer
Phys. Rev. A 101, 013617 (2020), preprint: arXiv:1910.06679
Editors' Suggestion
 Collective Multimode Vacuum Rabi Splitting
W. Guerin, T. S. do Espirito Santo, P. Weiss, A. Cipris, J. Schachenmayer, R. Kaiser, R. Bachelard
Phys. Rev. Lett. 123, 243401 (2019), preprint: arXiv:1909.06454  Robustness of Dicke subradiance against thermal decoherence
P. Weiss, A. Cipris, M. O. Araújo, R. Kaiser, W. Guerin
Phys. Rev. A 100, 033833 (2019), preprint: arXiv:1906.02918  Dressed dense atomic gases
I. Lesanovsky, B. Olmos, W. Guerin, R. Kaiser
Phys. Rev. A 100, 021401(R) (2019), preprint: arXiv:1902.02989  Comparison of three approaches to light scattering by dilute cold atomic ensembles
I. M. Sokolov, W. Guerin
J. Opt. Soc. Am. B 36, 2030 (2019), preprint: arXiv:1902.04289
 Intensity interferometry revival on the Côte d'Azur
O. Lai, W. Guerin, F. Vakili, R. Kaiser, J.P. Rivet, M. Fouché, G. Labeyrie, J. Chabé, C. Courde, E. Samain, D. Vernet
Proc. SPIE 10701, 1070121 (2018), preprint: arXiv:1810.08023
 Optical long baseline intensity interferometry: prospects for stellar physics
J.P. Rivet, F. Vakili, O. Lai, D. Vernet, M. Fouché, W. Guerin, G. Labeyrie, R. Kaiser
Exp. Astron. 46, 531 (2018) [free link for online reading], preprint: arXiv:1805.06078
 Spatial intensity interferometry on three bright stars
W. Guerin, J.P. Rivet, M. Fouché, G. Labeyrie, D. Vernet, F. Vakili, R. Kaiser
Mon. Not. Roy. Astron. Soc. 480, 245 (2018), preprint: arXiv:1805.06653
 Subradiance and radiation trapping in cold atoms
P. Weiss, M. O. Araújo, R. Kaiser, W. Guerin
New J. Phys. 20, 063024 (2018), preprint:arXiv:1803.01646  Diffusingwave spectroscopy of cold atoms in ballistic motion
A. Eloy, Z. Yao, R. Bachelard, W. Guerin, M. Fouché, R. Kaiser
Phys. Rev. A 97, 013810 (2018), preprint: arXiv:1710.03974  Decay dynamics in the coupleddipole model
M. O. Araújo, W. Guerin, R. Kaiser
J. Mod. Opt. 65, 1345 (2018) [link for 50 free copies], preprint: arXiv:1705.02190
 Temporal intensity interferometry: photon bunching on three bright stars
W. Guerin, A. Dussaux, M. Fouché, G. Labeyrie, J.P. Rivet, D. Vernet, F. Vakili, R. Kaiser
Mon. Not. Roy. Astron. Soc. 472, 4126 (2017), preprint: arXiv:1708.06119
 Population of collective modes in light scattering by many atoms
W. Guerin, R. Kaiser
Phys. Rev. A 95, 053865 (2017), preprint: arXiv:1702.01053
 Light interacting with atomic ensembles: collective, cooperative and mesoscopic effects
W. Guerin, M. T. Rouabah, R. Kaiser
J. Mod. Opt. 64, 895 (2017) [link for 50 free copies], preprint: arXiv:1605.02439
 Noise spectroscopy with large clouds of cold atoms
S. Vartabi Kashanian, A. Eloy, W. Guerin, M. Lintz, M. Fouché, R. Kaiser
Phys. Rev. A 94, 043622 (2016), preprint: arXiv:1606.07658
 Collective effects in the radiation pressure force
R. Bachelard, N. Piovella, W. Guerin, R. Kaiser
Phys. Rev. A 94, 033836 (2016), preprint: arXiv:1607.01157
 Diffusive to quasiballistic random laser: incoherent and coherent models
W. Guerin, Y. D. Chong, Q. Baudouin, M. Liertzer, S. Rotter, R. Kaiser
J. Opt. Soc. Am. B 33, 1888 (2016), preprint: arXiv:1606.03679
Editors' Pick
 Superradiance in a large and dilute cloud of cold atoms in the linearoptics regime
M. O. Araújo, I. Krešić, R. Kaiser, W. Guerin
Phys. Rev. Lett. 117, 073002 (2016), preprint: arXiv:1603.07204
 Temporal intensity correlation of light scattered by a hot atomic vapor
A. Dussaux, T. Passerat de Silans, W. Guerin, O. Alibart, S. Tanzilli, F. Vakili, R. Kaiser
Phys. Rev. A 93, 043826 (2016), preprint: arXiv:1601.00853
 Subradiance in a large cloud of cold atoms
W. Guerin, M. O. Araújo, R. Kaiser
Phys. Rev. Lett. 116, 083601(2016), preprint: arXiv:1509.00227
PRL Editors' Suggestion; see also: Storing Light in the Dark, by A. Carmele, Physics 9, 20 (2016).
Press: Brazilian Physical Society, INP CNRS.
 Raman process under condition of radiation trapping in a disordered atomic medium
L.V. Gerasimov, V. M. Ezhova, D. V. Kupriyanov, Q. Baudouin, W. Guerin, R. Kaiser
Phys. Rev. A 90, 013814 (2014), preprint: arXiv:1401.6641.
 Cold and hot atomic vapors: a testbed for astrophysics?
Q. Baudouin, W. Guerin, R. Kaiser
in Annual Review of Cold Atoms and Molecules, vol. 2, edited by K. Madison, K. Bongs, L. D. Carr, A. M. Rey, and H. Zhai
World Scientific, Singapour, 2014
Preprint: hal00968233
 Microscopic characterization of Lévy flights of light in atomic vapors
N. Mercadier, M. Chevrollier, W. Guerin, R. Kaiser
Phys. Rev. A 87, 063837 (2013), preprint: arXiv:1305.1714.
 A coldatom random laser
Q. Baudouin, N. Mercadier, V. Guarrera, W. Guerin, R. Kaiser
Nature Phys. 9, 357 (2013), preprint: arXiv:1301.0522.
See also Lasers: Amplified by randomness, by V. Vuletic, Nature Phys. News and Views 9, 325 (2013).
Press: Physics World, MIT Technology Review, Wired, POPSCI, Le fil UNS, WebTimeMedias, INP CNRS.
 Photonic properties of onedimensionallyordered cold atomic vapors under conditions of electromagnetically induced transparency
A. Schilke, C. Zimmermann, W. Guerin
Phys. Rev. A 86, 023809 (2012), preprint: arXiv:1206.2622.
 Optical parametric oscillation with distributed Feedback in cold atoms
A. Schilke, C. Zimmermann, Ph. W. Courteille, W. Guerin
Nature Photon. 6, 101 (2012), preprint: arXiv:1109.6114.
See also Allatom parametric oscillator, by M. T. Rakher and K. Srinivasan, Nature Photon. News and Views 6, 73 (2012).
Press: Laser Community, Reutlinger GeneralAnzeiger, Schwäbisches Tagblatt.
 Quasicontinuous horizontally guided atom laser: coupling spectrum and flux limits
A. Bernard, W. Guerin, J. Billy, F. Jendrzejewski, P. Cheinet, A. Aspect, V. Josse, P. Bouyer
New J. Phys. 13, 065015 (2011), preprint: arXiv:1012.2971.
 Photonic Band Gaps in OneDimensionally Ordered Cold Atomic Vapors
A. Schilke, C. Zimmermann, Ph. W. Courteille, W. Guerin
Phys. Rev. Lett. 106, 223903 (2011), preprint: arXiv:1101.3469.
 Anomalous photon diffusion in atomic vapours
M. Chevrollier, N. Mercadier, W. Guerin, R. Kaiser
Eur. Phys. J. D 58, 161 (2010), preprint: arXiv:1001.0320.
EPJD Highlight; press : Europhysics News 41 (4), 10 (2010)
 Towards a random laser with cold atoms
W. Guerin, N. Mercadier, F. Michaud, D. Brivio, L. S. FroufePérez, R. Carminati, V. Eremeev, A. Goetschy, S. E. Skipetrov, R. Kaiser
J. Opt 12, 024002 (2010), preprint: arXiv:0906.0714.
 Threshold of a random laser based on Raman gain in cold atoms
W. Guerin, N. Mercadier, D. Brivio, R. Kaiser
Opt. Express 17, 11236 (2009), preprint: arXiv:0903.5190.
 Lévy Flights of Photons in Hot Atomic Vapors
N. Mercadier, W. Guerin, M. Chevrollier, R. Kaiser
Nature Phys. 5, 602 (2009), preprint: arXiv:0904.2454.
Press : CNRS INP News, Le Journal du CNRS
 Threshold of a Random Laser with Cold Atoms
L. FroufePérez, W. Guerin, R. Carminati, R. Kaiser
Phys. Rev. Lett. 102, 173903 (2009), preprint: arXiv:0812.0266.
Press : Physical Review Focus, PhysOrg.Com, Photonics Spectra
 Mechanisms for Lasing with Cold Atoms as the Gain Medium
W. Guerin, F. Michaud, R. Kaiser,
Phys. Rev. Lett. 101, 093002 (2008), preprint: arXiv:0804.0109.
 Theoretical tools for atomlaserbeam propagation
J.F. Riou, Y. Le Coq, F. Impens, W. Guerin, C. J. Bordé, A. Aspect, P. Bouyer
Phys. Rev. A 77, 033630 (2008), preprint: arXiv:0802.4039.
 Guided atom laser: a new tool for guided atom optics
J. Billy, V. Josse, Z. Zuo, W. Guerin, A. Aspect, P. Bouyer
Ann. Phys. (France) 32, 17 (2007), preprint: arXiv:0712.1482.
 Source atomique cohérente dans des pièges optique et magnétique: réalisation d'un laser à atomes guidé
Ph. D. thesis of Université Paris Sud 11 (Orsay, France); Superviser: Alain Aspect
Available (in French) at http://tel.archivesouvertes.fr/tel00146375/.
 Guided Quasicontinuous Atom Laser
W. Guerin, J.F. Riou, J. P. Gaebler, V. Josse, P. Bouyer, A. Aspect
Phys. Rev. Lett. 97, 200402 (2006), preprint: arXiv:0607438.
Press: Physics Today, AIP Physics News Update, Nature Physics, PhysOrg.com, NewScientist.com.
 Beam Quality of a Nonideal Atom Laser
J.F. Riou, W. Guerin, Y. Le Coq, M. Fauquembergue, V. Josse, P. Bouyer, A. Aspect
Phys. Rev. Lett. 96, 070404 (2006), preprint: arXiv:0509281.
 Partially ferromagnetic electromagnet for trapping and cooling neutral atoms to quantum degeneracy
M. Fauquembergue, J.F. Riou, W. Guerin, S. Rangwala, F. Moron, A. Villing, Y. Le Coq, P. Bouyer, A. Aspect, M. Lécrivain
Rev. Sci. Instrum. 76, 103104 (2005), preprint: arXiv:0507129.

Mathilde Hugbart
Mathilde Hugbart
Mathilde Hugbart (Fouché)
CNRS researcher in the coldatom team
Institut de Physique de Nice, Université Côte d'Azur  Nice, France
Adress : 1361 Routes Lucioles 06560 Valbonne
Tel : +33 (0)4 92 96 73 35  Mail : mathilde.hugbart (at) inphyni.cnrs.fr
Research interests
Main current projects:
 Light scattering and intensity correlations in a cold atomic cloud
Coherence properties of light is one of the pillars in modern optics lectures, and this subject is usually addressed during the undergraduate level. Coherence gives access to different kinds of information, on the light itself with its coherence time or the size of the source through the measurement of its spatial coherence, on the emission processes such a s the thermal or chaotic one in a light bulb or the stimulated emission in a laser, or even on the lightmatter interaction when one studies for example the light scattered by atoms or molecules.
Those coherence properties can be characterized in different ways. Among the most used quantities, one can cite thefirst order temporal correlation function g^{(1)}(t), also known as the electric field correlation function, the optical spectrum or the frequency noise power spectral density. All those coherence quantities are linked to the firstorder correlation function of the electromagnetic eld. However, since the work of Glauber, it is well known that if one aims at fully characterizing the coherence properties of a light source, one needs to measure the correlation functions g^{(n)} at all orders n. Going one step further, one gets the secondorder temporal correlation function g^{(2)}(t), also called temporal intensity correlation function.
For chaotic light, or more generally for elds that present properties of Gaussian processes, it happens that the correlation functions g^{(n)}are simply linked to each other. A consequence is that there is an excess of intensity correlation at zero delay, g^{(2)}(0)> g^{(2)}(t). This is known as "photon bunching" or the "Hanbury Brown and Twiss" effect.However, it is also well known in quantum optics that this relation and this photon bunching are not necessarily valid. For example, laser light has a flat uncorrelated intensity correlation function. Its intensity fuctuations are only due to the shot noise. In this kind of situation, measuring g^{(2)}(t) opens the way to the study quantum eects and allows us to discriminate between dierent types of sources and to classify them.
We apply this technique of intensity correlation on the light scattered by an optically thick cold atomic cloud, which has already been shown to be a powerful technique, in particular to give information on the light matter interaction such as the effect of single or multiple scattering, or the impact of the laser intensity giving rise to the well known Mollow triplet.
The general goal is now to study the possibility to detect quantum correlations between the photons scattered by a multiatom source, correlations which are usually observed on single emitters and become hard to detect when the number of emitters is increased. The Mollow triplet is a wellknown effect for which strong correlations exist between the two sidebands and the carrier11. We want to demonstrate that quantum correlations, both between atoms and between photons, can also be detected in a multiatom source. This project is supported by an international ANR grant (PI: Mathilde Hugbart), in collaboration with experimentalists and theoreticians in São Carlos in Brazil.
 Intensity correlations for astrophysics
We also collaborate with astrophysicists of the Observatoire de la Côte d'Azur to work towards the revival of intensity interferometry (Hanbury Brown and Twiss technique) with modern photonic technologies.The use of intensity correlations (also called intensity interferometry) has been pioneered by Hanbury Brown and Twiss (HBT), who demonstrated the measurement of angular diameters of stars from the spatial intensity correlation function. However, after a series of impressive observations at the Narrabri observatory in the 1960s1970s, this technique has been abandoned, for two reasons. First, the signaltonoise ratio (SNR) of the measurements was rather poor, limited by the quantum efficiency of the detectors and, more importantly, by the electronic bandwidth available at that time. Second, the technique of direct interferometry started to be developed in the 1970s, which intrinsically provides a much better SNR, at the expense of a much greater complexity. However, there is currently a strong effort from different groups towards the revival of intensity interferometry with modern photonic technologies. Reaching kilometric baselines will open a completely new class of astronomical applications, mostly in stellar astrophysics and even a few extragalactic cases.Past projects:
 Vacuum magnetic birefringence
Classical electrodynamics, modified during the beginning of the XXth century to take into account quantum mechanics, gave rise to quantum electrodynamics (QED). Among the new phenomenon predicted by QED but never observed, one find the magnetic birefringence of vacuum, also called the CottonMouton effect of vacuum. In vacuum, the velocity of light propagating in the presence of a transverse magnetic field depends on the polarization of light. The index of refraction n_{// }for light polarized parallel to the magnetic field is different from the index of refraction n_{┴ }for the light polarized perpendicular to the magnetic field. The difference Δn=n_{//}n_{┴ }is proportional to B². Thus an incident linearly polarized light beam exits elliptically polarized from the magnetic field region. Euler et Kochel in 1935 and then Heisenberg et Euler in 1936 established the effective Lagrangian and calculated that a field of 1T should induce an anisotropy of the index of refraction of about Δn=4x10^{24}. That’s a real challenge !
The goal of the BMV project is to experimentally verify this prediction: in the presence of a magntiec field, the vacuum is birefringent. This would be the first evidence of the non linear propagation of light in the quantum vacuum. The project is based on intense pulsed magnetic fields (developped in the laboratory LNMIToulouse) and two polarizers placed on both sides of a FabryPerot cavity used as a sensitive ellipsometer. The cavity finesse, of the order of 500 000 or more, is a key ingredient and the mirrors are developped in collaboration with the laboratory LMALyon.
 Light shining through the wall experiment  axion search:
Axion is an hypothetical particle proposed in 1977 by Peccei and Quinn to solve a theoretical problem: the "strong CP problem". This particle could be bosonic, low mass, neutral, spinless, stable and would hardly interact with ordinary matter  a nearly undetectable particle. On the other hand, the axion can couple to two photons via the Primakoff effect. This is this property which is usually use in experiments trying to detect this particle. Particle characteristics are then given by its mass m_{a} and its inverse constant coupling with two photons M.
Axions could also plausibly explain the dark matter problem. In astrophysics, dark matter, supposed to represent a quarter of our universe, refers to undetectable matter invoked to explain various anomalies about galaxies. Different hypothesis have been proposed about its composition : molecular gaz, dead stars, a large number of brown dwarf, black holes... However the most common view is that dark matter is primarily nonbaryonic, as the axion. The detection of this particle would be a breakthrough in our universe comprehension.
Experimentally, the most precise limits are given by astrophyiscal sources where an high magnetic field is present, such as the sun. These limits, however, depend on the model used to calculate the flux of ALPs to be detected. Antoher possibility is to develop experiments in which axions are created and detected on earth. This is the goal of photoregeneration experiment or light shining though the wall experiment. The principleis to send a polarized photon beam through a region where a transverse magnetic field is present, and then to stop the photons by a wall. Since they hardly interact with matter, axionlike particles generated in the magnetic region upstream of the wall can pass through it. Behind the wall, a second magnetic field region allows to convertback axions into photons.
 Optical clock: PostDoc, SYRTE (Paris, France), team leader: Pierre Lemonde
Atomic fountains based on cold atoms and microwave transitions were for many years the state of the art in terms of frequency accuracy, at the10^{15 }level or better. Optical clocks appeared to be a good candidate to further improve this accuracy, with possibibly an improvement by 3 three orders of magnitude. One of the optical clock developped at LNESYRTE is based on Sr cold atoms confined in an optical alttice.
 Coherence of elongated BoseEinstein condensates: PHD, Institut d’Optique (Palaiseau, France), supervisors: Alain Aspect and Philippe Bouyer
The BoseEinstein condensate, the atomic counterpart to laser in optics, is usually considered as a fully coherent object. However this is true for systems of moderate anisotropy only. For highly elongated condensates, phase fluctuations appear along the long axis, and these imply a reduction of the coherence length. Such a phase fluctuating condensate is called a quasicondensate. In this thesis, we report on two experimental studies about the coherence of highly elongated condensates. The first study has been realized on condensates at equilibrium. The measurement of the coherence length has been done through the measurement of the correlation function using an interferometric method. Our results show the transition between a full phase coherent condensate and a quasicondensate, the coherence length decreasing when the amplitude of the phase fluctuations is increased. We have also observed that the expected shape of the correlation function changes from a Gaussianlike shape to an exponentiallike shape. The second study focuses on the formation of the condensate, and more particularly on the kinetic of the establishment of the phase coherence. Our results show that the growth of the condensed fraction proceeds qualitatively as for 3D nonphasefluctuating condensates. Finally, we have measured the coherence length during the formation using Bragg spectroscopy. Our results show a fast establishment of the coherence compared to the time needed for the condensed fraction to reach equilibrium.
Brief CV
Born 25th July 1978
Education
 2016: HDR (Habilitation à diriger des recherches) in physics, Université de Nice Sophia Antipolis (France)
Topic: Light propagation through magnetic field  Gases and vacuum magnetic birefringence  Manuscript (in French)
 2005: PhD in physics, Université ParisSud (Orsay, France)  Laboratoire Charles Fabry de l’Institut d’Optique (Orsay, France)
Supervisors: Alain Aspect and Philippe Bouyer
Grant: PhD Grant CIFRE  funding: ANRT et iXseaiXblue (Marly le Roi)
Topic: Study of the coherence properties of a BoseEinstein condensate at equilibrium and out of equilibrium  Manuscript (in French)
 2001: Master degree "Optics and photonics", Université ParisSud (Orsay, France).
 2001: Engineering degree from Institut d’Optique (Palaiseau, France).
Employment
 2015  ...: CNRS Research Associate at INPHYNI (formerly INLN)
Topics: Light scattering and intensity correlations in a cold atomic cloud  Intensity correlations for astrophysics  2010  2015: CNRS Research Associate at LNCMI (Toulouse, France)
Topic: Light propagation through magnetic field  Gases and vacuum magnetic birefringence  2006  2010: CNRS Research Associate at LCAR (Toulouse, France)
Topic: Light shining through the wall experiment  Search experiments for weakly interacting slim particles such as axion  2005  2006: Postdoctorate at LNESYRTE of Observatoire de Paris (Paris, France)
Team leader: Pierre Lemonde
Topic: Development of an optical clock with cold Sr atoms  2002  2005: PhD in Institut d'Optique (Orsay, France)  Laboratoire Charles Fabry de l’Institut d’Optique (Orsay)
Supervisors: Alain Aspect and Philippe Bouyer
Topic: Study of the coherence properties of a BoseEinstein condensate at equilibrium and out of equilibrium
Publications
For citation data (for both names: Hugbart and Fouché), see my Publons page.
Quick links by project:Light scattering in cold atoms
Submitted
 Connecting field and intensity correlations: the Sieget relation and how to test it
D. Ferreira, R. Bachelard, W. Guerin, R. Kaiser, M. Fouché
Preprint: arXiv:2002.05425
2019:
 Mollow triplet in cold atoms
L. OrtizGutiérrez, R. Celistrino Teixeira, A. Eloy,D. Ferreira, R. Kaiser, R. Bachelard and M. Fouché
New J. Phys. 21, 093019 (2019), preprint: arXiv:1901.07816
 Diffusingwave spectroscopy of cold atoms in ballistic motion
A. Eloy, Z. Yao, R. Bachelard, W. Guerin, M. Fouché, R. Kaiser
Phys. Rev. A 97, 013810 (2018), preprint: arXiv:1710.03974
2016:
 Noise spectroscopy with large clouds of cold atoms
S. Vartabi Kashanian, A. Eloy, W. Guerin, M. Lintz, M. Fouché, R. Kaiser
Phys. Rev. A 94, 043622 (2016), preprint: arXiv:1606.07658
Intensity correlations for astrophysics
2020:
 Intensity interferometry of P Cygni in the Hα emission line: towards distance calibration of LBV supergiant stars
J.P. Rivet, A. Siciak, E. S. G. de Almeida, F. Vakili, A. Domiciano de Souza, M. Fouché, O. Lai, D. Vernet, R. Kaiser, W. Guerin
Mon. Not. Roy. Astron. Soc. 494, 218 (2020), preprint: arXiv:1910.08366
2018:
 Intensity interferometry revival on the Côte d'Azur
O. Lai, W. Guerin, F. Vakili, R. Kaiser, J.P. Rivet, M. Fouché, G. Labeyrie, J. Chabé, C. Courde, E. Samain, D. Vernet
Proc. SPIE 10701, 1070121 (2018), preprint: arXiv:1810.08023
 Optical long baseline intensity interferometry: prospects for stellar physics
J.P. Rivet, F. Vakili, O. Lai, D. Vernet, M. Fouché, W. Guerin, G. Labeyrie, R. Kaiser
Exp. Astron. 46, 531 (2018) [free link for online reading], preprint: arXiv:1805.06078  Spatial intensity interferometry on three bright stars
W. Guerin, J.P. Rivet, M. Fouché, G. Labeyrie, D. Vernet, F. Vakili, R. Kaiser
Mon. Not. Roy. Astron. Soc. 480, 245 (2018), preprint: arXiv:1805.06653
2017:
 Temporal intensity interferometry: photon bunching on three bright stars
W. Guerin, A. Dussaux, M. Fouché, G. Labeyrie, J.P. Rivet, D. Vernet, F. Vakili, R. Kaiser
Mon. Not. Roy. Astron. Soc. 472, 4126 (2017), preprint: arXiv:1708.06119
Vacuum magnetic birefringence
2016:
 Limits on nonlinear electrodynamics
M. Fouché, R. Battesti and C. Rizzo
Phys. Rev. D 93, 093020 (2016), preprint: arXiv:1605.04102
2015:
 Circular and linear magnetic birefringence in xenon at lambda = 1064 nm
A. Cadène, M. Fouché, A. Rivère, R. Battesti, S. Coriani, A. Rizzo and C. Rizzo
J. Chem. Phys. 142, 124313 (2015), preprint: arXiv:1503.01719
2014:
 Vacuum magnetic linear birefringence using pulsed fields : status of the BMV experiment
A. Cadène, P. Berceau, M. Fouché, R. Battesti and C. Rizzo
Eur. Phys. J. D 68, 16 (2014), preprint: arXiv:1302.5389
2013:
 Faraday and CottonMouton effects of helium at lambda = 1064 nm
A. Cadène, D. Sordes, P. Berceau, M. Fouché, R. Battesti and C. Rizzo
Phys. Rev. A 88, 043815 (2013), preprint: arXiv:1307.6394  Quantum vacuum magnetooptics
R. Battesti, P. Berceau, M. Fouché, G. L. J. A. Rikken and C. Rizzo
Comptes Rendus Physique 14, 27 (2013)
2012:
 Quantum vacuum magnetic birefringence
P. Berceau, R. Battesti, M. Fouché, P. Frings, M. Nardone, O. Portugall, G. L. J. A. Rikken and C. Rizzo
Hyperfine interact 210, 7 (2012)  Magnetic linear birefringence measurements using pulsed fields
P. Berceau, M. Fouché, R. Battesti, and C. Rizzo
Phys. Rev. A 85, 013837 (2012), preprint: arXiv:1109.4792
2011:
 Observation of the inverse CottonMouton effect
A. BenAmar Baranga, R. Battesti, M. Fouché, C. Rizzo and G. L. J. A. Rikken
EPL 94, 44005 (2011), preprint: arXiv:1009.3152  The vacuum magnetic birefringence experiment : a test for quantum electrodynamics
P. Berceau, R. Battesti, M. Fouché and C. Rizzo
Can. J. Phys. 89, 153 (2011)
2010:
 Inverse CottonMouton effect of the vacuum and of atomic systems
C. Rizzo, A. Dupays, R. Battesti, M. Fouché and G. L. J. A. Rikken
EPL 90, 64003 (2010), preprint: arXiv:1005.0613  Dynamical behaviour of birefringent FabryPerot cavities
P. Berceau, M. Fouché, R. Battesti, F. Bielsa, J. Mauchain and C. Rizzo
Appl. Phys. B 100, 803 (2010), preprint: arXiv:1005.0613
2009:
 Birefringence of interferential mirrors at normal incidence : Experimental and computational study
F. Bielsa, A. Dupays, M. Fouché, R. Battesti, C. Robilliard and C. Rizzo
Appl. Phys. B 97, 457 (2009), preprint: arXiv:0907.4007
Light shining through the wall experiment
2010:
 Photon Regeneration Experiment for Axion Search Using XRays
R. Battesti, M. Fouché, C. Detlefs, T. Roth, P. Berceau, F. Duc, P. Frings, G. L. J. A. Rikken and C. Rizzo
Phys. Rev. Lett. 105, 250405 (2010), preprint: arXiv:1008.2672
2009:
 The BMV project : Search for photon oscillations into massive particles
C. Robilliard, B Pinto Da Souza, F. Bielsa, J. Mauchain, M. Nardone, G. Bailly, M. Fouché, R. Battesti, C. Rizzo
Can. J. Phys. 87, 735 (2009), preprint: arXiv:8012.1106
2008:
 Search for photon oscillations into massive particles
M. Fouché, C. Robilliard, S. Faure, C. Rizzo, J. Mauchain, M. Nardone, R. Battesti, L. Martin, A.M. Sautivet, J.L. Paillard, and F. Amiranoff
Phys. Rev. D 78, 032013 (2008), preprint: arXiv:0808.2800  A transportable pulsed magnet system for fundamental investigations in quantum electrodynamics and particle physics
S. Batut, J. Mauchain, R. Battesti, C. Robilliard, M. Fouché, and O. Portugall
IEEE Trans. Appl. Superconductivity 18, 600 (2008)
2007:
 No ”Light Shining through a Wall” : Results from a Photoregeneration Experiment
C. Robilliard, R. Battesti, M. Fouché, J. Mauchain, A.M. Sautivet, F. Amiranoff, and C. Rizzo
Phys. Rev. Lett. 99, 190403 (2007), preprint: arXiv:0707.1296
Optical clock
2008:
 An optical lattice clock with spinpolarized Sr87 atoms
X. Baillard, M. Fouché, R. Le Targat, P. G. Westergaard, A. Lecallier, F. Chapelet, M. Abgrall, G. D. Rovera, P. Laurent, P. Rosenbusch, S. Bize, G. Santarelli, A. Clairon, P. Lemonde, G. Grosche, B. Lipphardt, and H. Schnatz
Eur. Phys. J. D 48, 11 (2008), preprint: arXiv:0710.0086  New Limits on Coupling of Fundamental Constants to Gravity Using 87Sr Optical Lattice Clocks
S. Blatt, A. D. Ludlow, G. K. Campbell, J. W. Thomsen, T. Zelevinsky, M. M. Boyd, J. Ye, X. Baillard, M. Fouché, R. Le Targat, A. Brusch, P. Lemonde, M. Takamoto, F.L. Hong, H. Katori, and V. V. Flambaum
Phys. Rev. Lett. 100, 140801 (2008), preprint: arXiv:0801.1874
2007:
 Accuracy evaluation of an optical lattice clock with bosonic atoms
X. Baillard, M. Fouché, R. Le Targat, P. G. Westergaard, A. Lecallier, Y. Le Coq, G. D. Rovera, S. Bize, and P. Lemonde
Opt. Lett. 32, 1812 (2007), preprint: arXiv:physics:0703148  Accuracy evaluation of a Sr87 optical lattice clock
M. Fouché, R. Le Targat, X. Baillard, A. Brusch, O. Tcherbakoff, G. D. Rovera, and P. Lemonde
IEEE Trans. Inst. Meas. 56, 336 (2007)
2006:
 Accurate Optical Lattice Clock with 87Sr Atoms
R. Le Targat, X. Baillard, M. Fouché, A. Brusch, O. Tcherbakoff, G. D. Rovera, and P. Lemonde
Phys. Rev. Lett. 97, 130801 (2006), preprint: arXiv:physics:0605200  Hyperpolarizability Effects in a Sr Optical Lattice Clock
A. Brusch, R. Le Targat, X. Baillard, M. Fouché, and P. Lemonde
Phys. Rev. Lett. 96, 103003 (2006), preprint: arXiv:physics:0512201
Coherence of elongated BoseEinstein condensates
2007:
 Population and phase coherence during the growth of an elongated BoseEinstein condensate
M. Hugbart, J. A. Retter, A. F. Varon, P. Bouyer, A. Aspect, and M. J. Davis
Phys. Rev. A 75, 011602 (2007), preprint: arXiv:condmat:060234
2005:
 Suppression of Transport of an Interacting Elongated BoseEinstein Condensate in a Random Potential
D. Clément, A. F. Varon, M. Hugbart, J. A. Retter, P. Bouyer, L. SanchezPalencia, D. M. Gangardt, G. V. Shlyapnikov, and A. Aspect
Phys. Rev. Lett. 95, 170409 (2005), preprint: arXiv:condmat:050663  Coherence length of an elongated condensate : a study by matterwave inerferometry
M. Hugbart, J. A. Retter, F. Gerbier, A. F. Varon, S. Richard, J. H. Thywissen, D. Clément, P. Bouyer and A. Aspect
Eur. Phys. J. D 35, 155 (2005), preprint: arXiv:condmat:0501456
2004:
 Experimental study of the thermodynamics of an interacting trapped BoseEinstein condensed gas
F. Gerbier, J. H. Thywissen, S. Richard, M. Hugbart, P. Bouyer, and A. Aspect
Phys. Rev. A 70, 013607 (2004)  Critical Temperature of a Trapped,Weakly Interacting Bose Gas
F. Gerbier, J. H. Thywissen, S. Richard, M. Hugbart, P. Bouyer, and A. Aspect
Phys. Rev. Lett. 92, 030405 (2004), preprint: arXiv:condmat:0307188
2003:
 Momentum Spectroscopy of 1D Phase Fluctuations in BoseEinstein Condensates
S. Richard, F. Gerbier, J. H.Thywissen, M. Hugbart, P. Bouyer, and A. Aspect
Phys. Rev. Lett. 91, 010405 (2003), preprint: arXiv:condmat:0303137  Momentum distribution and correlation function of quasicondensates in elongated traps
F. Gerbier, J. H.Thywissen, S. Richard, M. Hugbart, P. Bouyer, and A. Aspect
Phys. Rev. A 67, 051602 (2003), preprint: arXiv:condmat:021109

Gian Luca Lippi
Gian Luca Lippi
Gian Luca Lippi
Professor at the Université Côte d'Azur conducting research on laser dynamics and smallsized lasers, as well as biophotonics, at the Institut de Physique de Nice.
For more information on research and teaching activities, or for a short CV, please consult: https://sites.google.com/site/gianlucalippi
Address
Institut de Physique de Nice
Université Côte d'Azur & CNRS  UMR 7010
1361 Route des Lucioles
06560 Valbonne, France
Contact
tel: +33 (0)4 92967304
email: gianluca [dot] lippi [at] inphyni [dot] cnrs [dot] fr 
Claire Michel
Claire Michel
Claire Michel
Assistant professor
Institut de Physique de Nice, Université Côte d'Azur  Nice, France
Adress : Parc Valrose, Avenue Joseph Vallot, 06108 Nice
Tel : +33 (0)4 92 07 67 88  Mail : claire.michel (at) inphyni.cnrs.fr
I am an experimentalist and numerician in optics, mainly working on nonlinear optics, statistical optics, wave turbulence, wave chaos, amont others.
Hot topics :
 Superfluid light in a nonlinear photorefractive crystal
 Optical vortex in a nonlinear medium
 Wave condensation
 Wave chaos in multimode optical fibers

Sergey Nazarenko
Sergey Nazarenko
Sergey Nazarenko
I'm a CNRS research director (Directeur de Recherche) at the Institut de Physique de Nice.
Address
Institut de Physique de Nice
Université Côte d'Azur & CNRS  UMR 7010
Parc Valrose
06108 Nice, FranceContact
tel: +33 (0) 4 92 07 67 56
email: sergey.nazarenko [at] inphyni.cnrs [dot] fr 
Christophe Raufaste
Christophe Raufaste
My webpage can be found with this link

Giovanna Tissoni
Giovanna Tissoni
Giovanna Tissoni
I am Professor at Universite Cote d'Azur, where I lead the Physics Department since Novembre 2017.
I do my research at the Institut de Physique de Nice. I work on spatiotemporal dynamics in nonlinear optical systems, dissipative solitons, neuromorphic optical systems and optical rogue waves.
Here is my google scholar page: https://scholar.google.com/citations?user=CzvCbdoAAAAJ&hl=en , or a publication list
A complete CV (in French) or a short one (in English)
A short summary of my recent research activity (in French)

Patrizia Vignolo
Patrizia Vignolo
Short curriculum vitae
 1970 Born in Lavagna (Genova, Italy)
 1994 Laurea (Degree) in Physics, University of Pisa (Italy)
 1999 Dottorato di Ricerca (Ph.D.) in Physics, University of Pisa (Italy)
 2000 Postdoc at the Scuola Normale Superiore of Pisa (Italy)
 2002 Research contract at the Scuola Normale Superiore of Pisa (Italy)
 2007 Professeur des Universités at the University of Nice  Sophia Antipolis
 20122016 Member of the CoNRS, Theoretical Physics Section (02)
 20122014 Directrice Adjointe of the Institut NonLinéaire de Nice  Sophia Antipolis (France)
 20152016 Directrice of the Institut NonLinéaire de Nice  Sophia Antipolis (France)
 2017... Member of the Bureau de la Division de la Matière Condensée (SFP)
 2017... Member of the Ecole des Houches scientific board
 2017... Associate Editor for the New Journal of Physics
Research activity
My research activity is the theoretical study of the equilibrium and dynamical properties of quantum gases. I am interested in studying the accessible observables in the actual experiments on ultracold atoms, that yield information about the coherence and the manybody correlations in the systems. These observables include both equilibrium quantities (such as density profiles, momentum distribution, densitydensity correlations) and dynamical quantities (such as singleparticle excitation spectrum, collective excitations, timedependent density profiles, timedependent momentumdistributions). In particular I’m expert in exact solutions for stronglycorrelated bosons and/or fermions trapped in onedimensional confinements.
Teaching activity
My teaching mission is the training in physics of students integrating Polytech Nice at postbaccalaureate level. It is essentially the teaching of basic courses like Optics and Mechanics.

Harunori Yoshikawa
Harunori Yoshikawa
Harunori Yoshikawa
I'm an Associate Professor at Université Côté d'Azur. I'm also an invited associate professor at Tokyo University of Science.
RESEARCH (see Publications)
 Pattern formation in fluids
 Instabilities and Bifurcations
COLLABORATION
 Innocent MUTABAZI, Laboratoire Ondes et Milieux Complexes, CNRS, Université du Havre, France
 Farzam ZOUESHTIAGH, Institut d'Electronique de Microélectronique et de Nanotechnologie, CNRS, Université de Lille, France
 Masato NAGATA, Tianjin University, China
 Ichiro UENO, Tokyo University of Science, Noda, Japan
 Yuji TASAKA, Hokkaido University, Sapporo, Japan
 Lizhong MU, Dalian University of Technology, Dalian, China
 Florian ZAUSSINGER, Brandenburg University of Technology CottbusSenftenberg, Germany