论文标题
光子输出场的突然变化标记量子狂犬模型中的相变
Sudden change of the photon output field marks phase transitions in the quantum Rabi model
论文作者
论文摘要
由于缺乏与之相关的签名实验性可观察物，量子兔模型对量子狂犬模型预测的量子相变的实验观察通常具有挑战性。在这里，我们描述了一种识别量子狂犬模型中的动力学关键现象的方法，该模型由三级原子和量子相变处的空腔组成。当原子和空腔最初未口气时，这种关键现象表现为由两个经典磁场驱动的系统中稳态输出光子的突然变化。当高频泵场转换为低频Stokes场和正常相的多个空腔光子时，该过程发生，而这种转换不能在超级阶段发生。稳态输出光子的突然变化是探测量子相变的实验可访问措施，因为它不需要准备平衡状态。
The experimental observation of quantum phase transitions predicted by the quantum Rabi model in quantum critical systems is usually challenging due to the lack of signature experimental observables associated with them. Here, we describe a method to identify the dynamical critical phenomenon in the quantum Rabi model consisting of a three-level atom and a cavity at the quantum phase transition. Such a critical phenomenon manifests itself as a sudden change of steady-state output photons in the system driven by two classical fields, when both the atom and the cavity are initially unexcited. The process occurs as the high-frequency pump field is converted into the low-frequency Stokes field and multiple cavity photons in the normal phase, while this conversion cannot occur in the superradiant phase. The sudden change of steady-state output photons is an experimentally accessible measure to probe quantum phase transitions, as it does not require preparing the equilibrium state.
