文献类型：期刊文献

英文题名：Light-shift-induced quantum phase transitions of a Bose-Einstein condensate in an optical cavity

作者：Liu, Ni[1,2];Lian, Jinling[2];Ma, Jie[1];Xiao, Liantuan[1];Chen, Gang[1,3];Liang, J. -Q.[2];Jia, Suotang[1]

机构：[1]Shanxi Univ, State Key Lab Quantum Opt & Quantum Opt Devices, Taiyuan 030006, Peoples R China;[2]Shanxi Univ, Inst Theoret Phys, Taiyuan 030006, Peoples R China;[3]Shaoxing Univ, Dept Phys, Shaoxing 312000, Peoples R China

年份：2011

卷号：83

期号：3

外文期刊名：PHYSICAL REVIEW A

收录：SCI-EXPANDED(收录号：WOS:000287960200006)、、EI(收录号：20111013731681)、Scopus(收录号：2-s2.0-79952305560)、WOS

基金：We thank T. Esslinger, F. Brennecke, J. Larson, J. Keeling, Jing Zhang, Chuanwei Zhang, Jinwu Ye, Yongping Zhang, and Lei Wu for helpful discussions and suggestions. This work was supported partly by the 973 Program under Grant No. 2006CB921603, the NNSFC under Grants No. 10704049, No. 10934004, No. 60978018, No. 61008012, No. 11074154, and No. 11075099, and the ZJNSF under Grant No. Y6090001.

语种：英文

外文关键词：Bose-Einstein condensation - Ground state - Phase diagrams - Phase transitions - Statistical mechanics

外文摘要：In this paper we reveal the rich ground-state properties induced by the strong nonlinear atom-photon interaction which has been found in the recent experiment about a Bose-Einstein condensate coupling with a high-finesse cavity [Nature (London) 464, 1301 (2010)]. Two detuning-dependent phase diagrams are revealed by investigating the experimentally measurable atomic population. In particular, two quantum phase transitions from the superradiant phase or the normal phase to a dynamically unstable phase are predicted in the blue detuning. Moreover, the three-phase coexistence points are found. It is also demonstrated that these predicted quantum phase transitions are the intrinsic transitions governed only by the second-order derivative of the ground-state energy. Finally, we also point out that the region involving coexistence of the superradiant phase and the normal phase previously predicted cannot happen in the ground state.