Interaction-induced Lipkin-Meshkov-Glick model in a Bose-Einstein condensate inside an optical cavity.
Interaction-induced Lipkin-Meshkov-Glick model in a Bose-Einstein condensate inside an optical cavity.
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DOI：
10.1364/oe.17.019682
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发表时间：
2009-10
期刊：
影响因子：
3.8
通讯作者：
Gang Chen;J. Liang;Suotang Jia
中科院分区：
文献类型：
--
作者：
Gang Chen;J. Liang;Suotang Jia
本文提出了一个实验上可行的方案来模拟玻色-爱因斯坦凝聚体与超高精细光学腔色散耦合的广义Lipkin-Meskov-Glick模型。该哈密顿量具有独特的优点，即利用Feshbach共振技术、沿沿着腔轴的泵浦激光器和外部驱动激光器可以独立地控制所有参数。通过适当的参数选择，可以实现大幅度的宏观量子相干效应。与现有的方案相比，我们的建议有一个更干净的，也许显着改善，以观察这整个连贯的效果。最后，我们预测了一种新的相互作用引起的拓扑转变，这是一个突然的变化，从π到零的Berry相位。
In this paper we present an experimentally feasible scheme to simulate a generalized Lipkin-Meskov-Glick model in a Bose-Einstein condensate coupled dispersively with an ultrahigh-finesse optical cavity. This obtained Hamiltonian has a unique advantage in that all parameters can be controlled independently by using Feshbach resonance technique, a pump laser along cavity axis and an external driving laser. By the proper choice of parameters, the macroscopic quantum coherent effect with a large amplitude can be successfully achieved. Comparing with the exist schemes, our proposal has a cleaner, perhaps significantly improved to observe this whole coherent effect. Finally, we predict a novel interaction-induced topological transition, which is an abrupt variation from pi to zero of the Berry phase.