文献类型：期刊文献

中文题名：双模Dicke模型的一级量子相变

英文题名：Firstorder quantum phase transition in the two-mode Dicke model

作者：俞立先[1,2];梁奇锋[2];汪丽蓉[3];朱士群[1]

机构：[1]苏州大学物理科学与技术学院;[2]绍兴文理学院数理信息学院;[3]山西大学激光光谱研究所

年份：2014

期号：13

起止页码：156

中文期刊名：物理学报

外文期刊名：Acta Physica Sinica

收录：SCI-EXPANDED(收录号：WOS:000338765700020)、CSTPCD、、北大核心2011、EI(收录号：20142917963087)、Scopus(收录号：2-s2.0-84904256843)、WOS、北大核心、CSCD、CSCD2013_2014

基金：Project supported by the National Natural Science Foundation of China (Grant Nos. 11074184, 11275129, 61275211), the Natural Science Foundation of Zhejiang Province, China (Grant No. LY13A040001), and the Scientific Research Fundation of the Education Department of Zhejiang Province, China (Grant No. Y201122352).

语种：中文

中文关键词：双模Dicke模型;基态能;量子相变

外文关键词：two-mode Dicke model;ground-state energy;quantum phase transitions

中文摘要：多光场与多粒子相互作用的多模Dicke模型不但存在着更为丰富的量子相,而且在量子信息中有着重要的应用.本文运用Holstein-Primakoff变换和玻色扩展法研究双模Dicke模型的基态特性并从理论上发现了一个新的一级量子相变.该相变在实验上可以通过测量平均光子数或原子布居数进行观察.

外文摘要：The multi-mode Dicke model, which describes many atoms interacting with the multi-mode photons, has attracted much attention; it not only exhibits rich quantum phases, but also has an important application in quantum informa-tion. In this paper, we explore the ground-state properties of the two-mode Dicke model by the Holstein-Primakoff transformation and Boson expansion method, and theoretically predict a new first-order quantum phase transition. In the experiment, this quantum phase transition could be detected by measuring the mean-photon number or the atom population.