论文标题
从量子狂犬模型到Jaynes-Cummings模型：破坏对称的量子相变，拓扑相变和多政治性
From quantum Rabi model to Jaynes-Cummings model: symmetry-breaking quantum phase transitions, topological phase transitions and multicriticalities
论文作者
论文摘要
我们研究了连接基本QRM和Jaynes-Cummings模型（JCM）的各向异性量子兔模型（QRM）的基态（GS）和激发差距。虽然GS在低频限制下具有二阶量子相变（QPT），但打开有限频率，我们在相图上发出了新的灯光，以照亮一阶过渡系列的精细结构。我们发现QPT伴随着隐藏的对称性破坏，而新兴的系列过渡是拓扑过渡，而无需打破对称性。波函数的拓扑结构在桥接QRM和JCM时提供了一种新颖的普遍性分类。我们表明，传统上建立的三重点实际上是五重奏或六重点，并且遵循Penta-/hexa-Criticalition，出现了一系列的四焦点。
We study the ground state (GS) and excitation gap of anisotropic quantum Rabi model (QRM) which connects the fundamental QRM and the Jaynes-Cummings model (JCM). While the GS has a second-order quantum phase transition (QPT) in the low frequency limit, turning on finite frequencies we shed a novel light on the phase diagram to illuminate a fine structure of first-order transition series. We find the QPT is accompanied with a hidden symmetry breaking, whereas the emerging series transitions are topological transitions without symmetry breaking. The topological structure of the wave function provides a novel universality classification in bridging the QRM and the JCM. We show that the conventionally established triple point is actually a quintuple or sextuple point and following the penta-/hexa-criticality emerge a series of tetra-criticalities.
