Counting statistics of the Dicke superradiance phase transition
Counting statistics of the Dicke superradiance phase transition
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Dicke 超辐射相变的计数统计
DOI：
10.1103/physreva.87.043840
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发表时间：
2013
影响因子：
2.9
通讯作者：
T. Brandes
中科院分区：
文献类型：
--
作者：
W. Kopylov;C. Emary;T. Brandes
我们考虑一个驱动的单模Dicke-Hamilton耦合到一个耗散零温浴。我们推导出的累积生成函数的发射光子的量子临界系统通过使用$P$-表示的主方程的热力学极限。该累积量生成函数由两部分组成：一个宏观分量，它是泊松性质的特征速率与系统的序参数成比例;和一个部分描述波动，这是非平凡的形式和发散周围的量子相变。
We consider a driven single mode Dicke-Hamiltonian coupled to a dissipative zero-temperature bath. We derive the cumulant generating function for emitted photons of this quantum-critical system by using a $P$-representation of the master equation in the thermodynamic limit. This cumulant generating function is shown to consist of two parts: a macroscopic component, which is Poissonian in nature with characteristic rate proportional to the order parameter of the system; and a part describing fluctuations which is non-trivial in form and divergent around the quantum phase transition.