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Q: Fachverband Quantenoptik und Photonik

Q 37: Quantum Gases (Bosons) IV

Q 37.4: Vortrag

Dienstag, 6. März 2018, 14:45–15:00, K 2.020

QED treatment of the photon BEC in arbitrary geometries: Coupled dissipative dynamics of dye molecules — •Yaroslav Gorbachev¹, Robert Bennett¹, and Stefan Yoshi Buhmann^1,2 — ¹Institute of Physics, University of Freiburg, Germany — ²Freiburg Institute for Advanced Studies (FRIAS), University of Freiburg, Germany

Progress in photonics over the last few years has led to a new challenge in quantum optics: the photon BEC. This has been experimentally observed in a small microcavity filled with a dye medium [1]. Confinement of laser light within such an optical microcavity creates conditions for light to equilibrate as a gas of conserved particles. We use the language of macroscopic quantum electrodynamics [2] together with theory of open quantum systems [3] to describe this phenomenon. We are interested in realistic description of the cavity geometry, whose frequency dependent reflection and absorption are fully encoded in the classical Green's function for the electromagnetic Helmholtz equation. This extension of the standard Jaynes-Cummings model to absorbing cavities with realistic geometries opens the door to studying the effects of discrete mode coupling in a resonant geometry to the strong body-assisted electromagnetic field of the cavity.

[1] J.Klaers, J.Schmitt, F. Vewinger, and M. Weitz, Nature (London) 468, 545 (2010)

[2] S.Y.Buhmann, Dispersion Forces I, Springer, Berlin Heidelberg, 2012

[3] P. Kirton, J.Keeling, Phys.Rev. A 91, 033826 (2015)