光子修饰量子临界原子传感器的动态灵敏度
Dynamic sensitivity of phton-dressed atomic ensenmble with quantum criticality
摘要：
本文研究了在量子临界点附近用Dicke模型描述的单模腔场修饰原子系综（称为光子修饰原子系综）的动态灵敏度。结果表明，当一个处于纯初态的原子穿过腔时，光子修饰的原子系综将经历一个量子相变，表现出明显的动力学突变，其特征是该量子临界系统的Loschirton回声.由于Dicke模型具有这样的动态灵敏度，因此可以通过经典的相变增强轨迹来模拟云室来检测飞行粒子。
英文摘要：
We study the dynamic sensitivity of an atomic ensemble dressed by a single-mode cavity field (called a photon-dressed atomic ensemble), which is described by the Dicke model near the quantum critical point. It is shown that when an extra atom in a pure initial state passes through the cavity, the photon-dressed atomic ensemble will experience a quantum phase transition, showing an explicit sudden change in its dynamics characterized by the Loschmidt echo of this quantum critical system. With such dynamic sensitivity, the Dicke model can resemble to the cloud chamber for detecting a flying particle by the enhanced trajectory due to the classical phase transition.
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