Quantum Phases in a Quantum Rabi Triangle
Quantum Phases in a Quantum Rabi Triangle
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量子拉比三角形中的量子相
DOI：
10.1103/physrevlett.127.063602
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发表时间：
2021
影响因子：
8.6
通讯作者：
Zhang Xue-Feng
中科院分区：
文献类型：
--
作者：
Zhang Yu-Yu;Hu Zi-Xiang;Fu Libin;Luo Hong-Gang;Pu Han;Zhang Xue-Feng
相互作用、对称性和规范场的相互作用通常会导致有趣的量子多体相。为了探索新兴阶段的性质，我们研究了量子拉比三角形系统作为合成人工磁场的基本构建块。我们发展了一种分析方法来研究富相图和相关的量子临界性。特别令人感兴趣的是出现了手征相干相，这打破了对称性和手征对称性。在这个手征相中，光子单向流动，手征性可以通过人工规范场进行调谐，表现出时间反演对称性破缺的特征。有限频率标度分析进一步证实了相关的相变属于迪凯模型的普适类。该模型可以模拟光-物质耦合系统的各种物理现象，并可能在各种量子信息技术的未来发展中有所应用。
The interplay of interactions, symmetries, and gauge fields usually leads to intriguing quantum many-body phases. To explore the nature of emerging phases, we study a quantum Rabi triangle system as an elementary building block for synthesizing an artificial magnetic field. We develop an analytical approach to study the rich phase diagram and the associated quantum criticality. Of particular interest is the emergence of a chiral-coherent phase, which breaks both theand the chiral symmetry. In this chiral phase, photons flow unidirectionally and the chirality can be tuned by the artificial gauge field, exhibiting a signature of broken time-reversal symmetry. The finite-frequency scaling analysis further confirms the associated phase transition to be in the universality class of the Dicke model. This model can simulate a broad range of physical phenomena of light-matter coupling systems, and may have an application in future developments of various quantum information technologies.