中国物理B ›› 2021, Vol. 30 ›› Issue (11): 110301-110301.doi: 10.1088/1674-1056/abf4f9

• • 上一篇    下一篇

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

Hui-Fang Wang(王慧芳)1, Jin-Jun Zhang(张进军)2,†, and Jian-Jun Zhang(张建军)2,‡   

  1. 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
  • 收稿日期:2021-01-19 修回日期:2021-03-08 接受日期:2021-04-06 出版日期:2021-10-13 发布日期:2021-10-13
  • 通讯作者: Jin-Jun Zhang, Jian-Jun Zhang E-mail:jjzhang2021@163.com;yfzhangphys@163.com
  • 基金资助:
    Project supported by the Graduate Science and Technology Innovation Project of Shanxi Normal University (Grant No. 01053011) and the Chinese Academy of Sciences (CAS) Large-Scale Scientific Facility Program (Grant No. 1G2017IHEPKFYJO1).

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

Hui-Fang Wang(王慧芳)1, Jin-Jun Zhang(张进军)2,†, and Jian-Jun Zhang(张建军)2,‡   

  1. 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
  • Received:2021-01-19 Revised:2021-03-08 Accepted:2021-04-06 Online:2021-10-13 Published:2021-10-13
  • Contact: Jin-Jun Zhang, Jian-Jun Zhang E-mail:jjzhang2021@163.com;yfzhangphys@163.com
  • Supported by:
    Project supported by the Graduate Science and Technology Innovation Project of Shanxi Normal University (Grant No. 01053011) and 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

Abstract: 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.

Key words: parallel light, Bose-Einstein condensation, quantum phase transition, collective excitation

中图分类号:  (Classical field theories)

  • 03.50.-z
03.75.Kk (Dynamic properties of condensates; collective and hydrodynamic excitations, superfluid flow) 05.30.Jp (Boson systems) 42.65.-k (Nonlinear optics)