Dicke-like quantum phase transition and vacuum entanglement with two coupled atomic ensembles

Dicke-like quantum phase transition and vacuum entanglement with two coupled atomic ensembles
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类迪克量子相变和两个耦合原子系综的真空纠缠

DOI:
10.1103/physreva.84.033817
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发表时间:
2011-09
期刊:
Physical Review A (atomic, Molecular and Optical Physics)
影响因子:
--
通讯作者:
Zheng, Shi-Biao
Zheng, Shi-Biao
中科院分区:
其他
文献类型:
--
作者:
Zheng, Shi-Biao

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在热力学极限下研究了两个相互作用原子系综系统的相干合作现象。值得注意的是,该系统表现出类似Dicke的量子相变和纠缠行为,尽管控制哈密顿量与自旋玻色子迪凯哈密顿量有根本的不同,提供了研究纯物质波的集体物质-光动力学的机会。该模型可以实现两个玻色-爱因斯坦凝聚或原子系综被困在两个光学腔相互耦合。两个独立样品之间的相互作用由虚光子交换引起。
We study the coherent cooperative phenomena of the system composed of two interacting atomic ensembles in the thermodynamic limit. Remarkably, the system exhibits the Dicke-like quantum phase transition and entanglement behavior although the governing Hamiltonian is fundamentally different from the spin-boson Dicke Hamiltonian, offering the opportunity for investigating collective matter-light dynamics with pure matter waves. The model can be realized with two Bose-Einstein condensates or atomic ensembles trapped in two optical cavities coupled to each other. The interaction between the two separate samples is induced by virtual photon exchange.
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