Novel symmetry-broken phase in a driven cavity system in the thermodynamic limit
Novel symmetry-broken phase in a driven cavity system in the thermodynamic limit
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热力学极限驱动腔系统中的新型对称破缺相
DOI：
10.1088/0953-4075/47/2/025501
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
and Seiji Miyashita
中科院分区：
文献类型：
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作者：
Tatsuhiko Shirai;Mori Takashi;and Seiji Miyashita
研究了在耗散环境下驱动场作用下，由多原子组成的与量子化腔场模式相互作用的腔系统的非平衡定态。我们导出了一个量子主方程，它适用于处理具有强驱动场和强原子-光子相互作用的系统。由于原子和光子之间的均匀耦合，我们利用平均场动力学在热力学极限下是精确的这一事实来做到这一点。我们发现有序态具有对称破缺分量的光子场和由外场驱动的原子激发。从量子干涉效应的角度讨论了这些有序态产生的机制。
We study non-equilibrium stationary states of a cavity system consisting of many atoms interacting with a quantized cavity field mode, under a driving field in a dissipative environment. We derive a quantum master equation which is suitable for treating systems with a strong driving field and a strong atom–photon interaction. We do this by making use of the fact that the mean-field dynamics are exact in the thermodynamic limit thanks to a uniform coupling between atoms and photons. We find ordered states with symmetry-broken components of the photon field and atomic excitation driven by the external field. The mechanism by which these ordered states arise is discussed from the viewpoint of the quantum interference effect.