交叉线性极化光学腔中超冷玻色气体的量子相变  

Quantum Phase Transitions of Ultracold Bose Gases in a Cross-Linear Polarized Optical Cavity

作　　者：吴兆迪 覃威 郑东琛 廖任远 WU Zhaodi;QIN Wei;ZHENG Dongchen;LIAO Renyuan(Fujian Provincial Key Laboratory of Quantum Manipulation and New Energy Materials,College of Physics and Energy,Fujian Normal University,Fuzhou 350117,China)

机构地区：[1]福建师范大学物理与能源学院,福建省量子调控与新能源材料重点实验室,福建福州350117

出　　处：《福建师范大学学报（自然科学版）》2024年第6期55-62,共8页Journal of Fujian Normal University：Natural Science Edition

基　　金：国家自然科学基金资助项目(12174055);福建省自然基金资助项目(2020J01195)。

摘　　要：构造两个高品质线性极化光学腔同自旋玻色-爱因斯坦凝聚体(Bose-Einstein condensate,BEC)耦合的理论模型,原子通过原子极化率的矢量部分和标量部分分别同两腔进行耦合。在低能极限下,基于朗道相变理论,对该模型潜在的量子相变进行了预测。随着泵浦光场强度以及单原子自旋同腔1电场夹角的改变,系统将在正常相、单腔超辐射相和双腔混合超辐射相之间转变。This paper constructs a theoretical model of two high-quality linearly polarized optical cavities,each coupled with a spinor component Bose-Einstein condensate(BEC).The atoms couple with the two cavities through the vector and scalar components of the atomic polarizability,respectively.In the low-energy limit,based on the Landau s phase transition theory,we predict the potential quantum phase transitions of this model.As the intensity of the pump light field and the angle between the single-atom spin and the electric field of cavity 1 change,the system will undergo transitions between the normal phase,single-cavity superradiant phase,and dual-cavity mixed superradiant phase.

关 键 词：BEC 光学腔 平均场理论 超辐射 量子相变 

分 类 号：O469[理学—凝聚态物理]