TY - JOUR
A1 - Stein, Enrico
A1 - Vewinger, Frank
A1 - Pelster, Axel
T1 - Collective modes of a photon Bose–Einstein condensate with thermo-optic interaction
T2 - New Journal of Physics
N2 - Although for photon Bose–Einstein condensates the main mechanism of the observed photon–photon interaction has already been identified to be of a thermo-optic nature, its influence on the condensate dynamics is still unknown. Here a mean-field description of this effect is derived, which consists of an open-dissipative Schrödinger equation for the condensate wave function coupled to a diffusion equation for the temperature of the dye solution. With this system at hand, the lowest-lying collective modes of a harmonically trapped photon Bose–Einstein condensate are calculated analytically via a linear stability analysis. As a result, the collective frequencies and, thus, the strength of the effective photon–photon interaction turn out to strongly depend on the thermal diffusion in the cavity mirrors. In particular, a breakdown of the Kohn theorem is predicted, i.e. the frequency of the centre-of-mass oscillation is reduced due to the thermo-optic photon–photon interaction.
Y1 - 2019
UR - https://kluedo.ub.uni-kl.de/frontdoor/index/index/docId/5822
UR - https://nbn-resolving.org/urn:nbn:de:hbz:386-kluedo-58225
SN - 1367-2630
IS - 21, 2019
PB - IOP
ER -