Proposed realization of the Dicke-model quantum phase transition in an optical cavity QED system
Proposed realization of the Dicke-model quantum phase transition in an optical cavity QED system
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DOI：
10.1103/physreva.75.013804
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发表时间：
2007-01-01
影响因子：
2.9
通讯作者：
Carmichael, H. J.
中科院分区：
文献类型：
--
作者：
Dimer, F.;Estienne, B.;Carmichael, H. J.
迪凯模型描述了一个两态原子系综与电磁场的一个量子化模相互作用（省略了A（2）项），在偶极耦合强度的临界值处表现出零温相变。我们提出了一个基于多级原子和腔介导的拉曼跃迁的方案，实现了一个有效的迪凯模型在相变制度。来自腔的光学光携带临界行为的签名，其被分析为原子数量非常大的热力学极限。
The Dicke model describing an ensemble of two-state atoms interacting with a single quantized mode of the electromagnetic field (with omission of the A(2) term) exhibits a zero-temperature phase transition at a critical value of the dipole coupling strength. We propose a scheme based on multilevel atoms and cavity-mediated Raman transitions to realize an effective Dicke model operating in the phase transition regime. Optical light from the cavity carries signatures of the critical behavior, which is analyzed for the thermodynamic limit where the number of atoms is very large.