Quantum phase transition in the multimode Dicke model
Quantum phase transition in the multimode Dicke model
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DOI：
10.1103/physrevb.75.024402
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发表时间：
2006-06
影响因子：
3.7
通讯作者：
D. Tolkunov;D. Solenov
中科院分区：
文献类型：
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作者：
D. Tolkunov;D. Solenov
对离散场和连续场Dicke模型中的量子相变进行了研究。在场模带中揭示了临界后的一系列抗交叉特征。计算临界指数。我们研究了用并发测量的一对纠缠的性质，并在热力学极限下得到了解析结果。
An investigation of the quantum phase transition in both discrete and continuum field Dicke models is presented. A series of anticrossing features following the criticality is revealed in the band of the field modes. Critical exponents are calculated. We investigate the properties of a pairwise entanglement measured by a concurrence and obtain analytical results in the thermodynamic limit.