Classical-field description of Bose-Einstein condensation of parallel light in a nonlinear optical cavity  

作　　者：Hui-Fang Wang Jin-Jun Zhang Jian-Jun Zhang 王慧芳;张进军;张建军(School of Chemistry and Material Science,Shanxi Normal University,Linfen 041004,China;School of Physics and Information Science,Shanxi Normal University,Linfen 041004,China)

机构地区：[1]School of Chemistry and Material Science,Shanxi Normal University,Linfen 041004,China [2]School of Physics and Information Science,Shanxi Normal University,Linfen 041004,China

出　　处：《Chinese Physics B》2021年第11期185-195,共11页中国物理B（英文版）

基　　金：Project supported by the Graduate Science and Technology Innovation Project of Shanxi Normal University(Grant No.01053011);the Chinese Academy of Sciences(CAS)Large-Scale Scientific Facility Program(Grant No.1G2017IHEPKFYJO1).

摘　　要：We study the Bose–Einstein condensation of parallel light in a two-dimensional nonlinear optical cavity,where the massive photons are converted into photon molecules(p-molecules).We extend the classical-field method to provide a description of the two-component system,and we also derive a coupled density equation which can be used to describe the conversion relation between photons and p-molecules.Furthermore,we obtain the chemical potential of the system,and we also find that the system can transform from the mixed photon and p-molecule condensate phase into a pure p-molecule condensate phase.Additionally,we investigate the collective excitation of the system.We also discuss the problem how the spontaneous decay of an atom is influenced by both the phase transition and collective excitation of the coupling system.

关 键 词：parallel light Bose-Einstein condensation quantum phase transition collective excitation 

分 类 号：O469[理学—凝聚态物理]