Thermodynamics of trapped photon gases at dimensional crossover from 2D to 1D

Abstract Photon Bose-Einstein condensates are characterised by a quite weak interaction, so they behave nearly as an ideal Bose gas. Moreover, since the current experiments conducted in microcavity, longitudinal motion is frozen out and photon gas represents effectively two-dimensional trapped of massive bosons. In this paper we focus on harmonically confined two dimensions, where anisotropy confinement allows for dimensional crossover. If one direction strong enough that squeezed out, then only degree freedom survives system can be considered to quasi-one dimensional. view experimental set-up work analytically thermodynamic properties such with finite number photons. particular, examining information which contained respective quantities.