论文标题
量子三角形中手性相位阶段的量子三临界
Quantum tricriticality of chiral-coherent phase in quantum Rabi triangle
论文作者
论文摘要
相互作用，对称性和量规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，我们研究了一个量子狂犬三角系统，作为用于合成人造磁场的基本构建块。我们开发了一种分析方法来研究丰富的相图和相关的量子关键。特别令人感兴趣的是手性阶段的出现，它破坏了$ \ mathbb {z} _2 $和手性对称性。在这个手性阶段，光子在单向上流动和手性可以通过人工量规场来调节，表现出破裂的时间反转对称性的特征。有限的频率缩放分析进一步证实了相关的相变位于Dicke模型的通用类别中。该模型可以模拟轻型耦合系统的广泛物理现象，并可能在未来的各种量子信息技术的发展中应用。
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 the $\mathbb{Z}_2$ and 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.
