物理学报2013，Vol.62Issue(1)：156-160,5.DOI:10.7498/aps.62.013402
激光驱动下腔与玻色-爱因斯坦凝聚中的量子相变
Quantum phase transition of a Bose-Einstein condensate in an optical cavity driven by a laser field
摘要
Abstract
When an atomic ensemble is coupled with a cavity field governed by the well-known Dicke model, an important quantum phase transition (QPT) from the normal phase to the superradiant phase occurs, which was predicted more than 30 years ago. In this paper, both the atom-photon nonlinear interaction and the driving field are added to the Dicke's Hamiltonian. With the method of Holstein-Primafoff transformation, the ground state energy is given by the theoretical calculation, and the rich phase figures are presented. Meanwhile, these properties are observed experimentally. We mainly dicuss the effects of the atom-photon nonlinear interaction and the driving field on QPT.关键词
Dicke模型/量子相变/Holstein-Primafoff变换Key words
Dicke model/ quantum phase transition/ Holstein-Primafoff transformation引用本文复制引用
刘妮..激光驱动下腔与玻色-爱因斯坦凝聚中的量子相变[J].物理学报,2013,62(1):156-160,5.基金项目
国家自然科学基金(批准号:11075099,11047167,11105087)资助的课题. （批准号:11075099,11047167,11105087）
