Séminaire de Claudiu Genes

10/01/2020 Sophia

Applications of collective dissipative effects in dense quantum emitter ensembles

Dense ensembles of atoms/molecules exhibit collective radiative effects brought on by the common interaction with the electromagnetic vacuum modes. Collective subradiant states show large lifetimes and thus are useful to applications in metrology [1] or quantum information [2]. Moreover, in the context of cavity quantum electrodynamics, subradiant ensembles can strongly modify standard scaling laws of the collective light-matter interactions [3] and lead to enhanced optical nonlinearities [4]. Using a recently developed quantum Langevin equations approach to include vibronic couplings typical for molecular systems [5], we investigate aspects of super/subradiance in dense molecular ensembles.

 

[1] L. Ostermann, H. Ritsch and C. Genes, Protected state enhanced quantum metrology with interacting two-level ensembles, Phys. Rev. Lett. 111, 123601 (2013).
[2] D. Plankensteiner, L. Ostermann, H. Ritsch and C. Genes, Selective protected state preparation of coupled dissipative quantum emitters, Sci. Reps. 5, 16231 (2015).
[3] D. Plankensteiner, C. Sommer, H. Ritsch and C. Genes, Cavity antiresonance spectroscopy of dipole coupled subradiant arrays, Phys. Rev. Lett. 119, 093601 (2017).
[4] D Plankensteiner, C Sommer, M Reitz, H Ritsch, C Genes, Enhanced collective Purcell effect of coupled quantum emitter systems, Physical Review A 99, 043843 (2019).
[5] M. Reitz, C. Sommer and C. Genes, Langevin approach to quantum optics with molecules, Phys. Rev. Letts. 122, 203602, (2019).

 

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