论文标题
迪克三角
Chiral Quantum Phases and Tricriticality in a Dicke Triangle
论文作者
论文摘要
在Dicke Triangle（TDT）中发现了量子三临界性和外来相的存在，其中三个腔（每个腔）通过人工磁场的作用而彼此连接，每个腔体包含一个三层原子的集合。常规的上级相（SR）通过一阶和二阶边界连接到正常相，三智度点位于此类边界的相交。除了SR阶段，还可以通过调整人工磁场来找到手性超级（CSR）相。该阶段的特征是非零光子电流，其边界呈现手性三智度点（CTCP）。通过研究不同的关键指数，我们能够区分CTCP和TCP的通用类别与二阶关键点的通用类别，并在两个不同的级别阶段中找到独特的临界行为。 TDT可以在各种系统中实现，包括光腔中的原子以及电路QED系统，从而探索各种临界流形。
The existence of quantum tricriticality and exotic phases are found in a Dicke triangle (TDT) where three cavities, each one containing an ensemble of three-level atoms, are connected to each other through the action of an artificial magnetic field. The conventional superradiant phase (SR) is connected to the normal phase through first- and second-order boundaries, with tricritical points located at the intersection of such boundaries. Apart from the SR phase, a chiral superradiant (CSR) phase is found by tuning the artificial magnetic field. This phase is characterized by a nonzero photon current and its boundary presents chiral tricritical points (CTCPs). Through the study of different critical exponents, we are able to differentiate the universality class of the CTCP and TCP from that of second-order critical points, as well as find distinctive critical behavior among the two different superradiant phases. The TDT can be implemented in various systems, including atoms in optical cavities as well as the circuit QED system, allowing the exploration of a great variety of critical manifolds.
