论文标题
基于空腔的刺激拉曼绝热通道中混乱的量子特征
Quantum signatures of chaos in a cavity-QED-based stimulated Raman adiabatic passage
论文作者
论文摘要
非线性刺激的拉曼绝热通道（Stirap）是一个引人入胜的物理过程，动态探索混乱和非骨质阶段。在最近的论文物理中。 Rev. Res。 2，042004（r）（2020），这种现象在腔QED平台中实现。在那里，混乱的出现及其对搅拌效率的影响主要在半经典限制中证明。在本文中，我在完全量子的多体框架中处理该问题。为了提取经典混乱的系统的量子特征，表明，超时订购的相关器（OTOC）测量精确捕获了系统的混乱/非差异特征。 OTOC的预测与Lyapunov指数（LE）量化的经典混乱相匹配。此外，结果表明，与半经典状态相对应的量子路线在混乱阶段遇到单粒子纯度的倾角，描绘了混乱的结果。通过混乱阶段的动力学与多体量子状态的扩散以及参与绝热特征态的数量不可逆地增加有关。
A nonlinear stimulated Raman adiabatic passage (STIRAP) is a fascinating physical process that dynamically explores chaotic and non-chaotic phases. In a recent paper Phys. Rev. Res. 2, 042004 (R) (2020), such a phenomenon is realized in a cavity-QED platform. There, the emergence of chaos and its impact on STIRAP efficiency are mainly demonstrated in the semiclassical limit. In the present paper I treat the problem in a fully quantum many-body framework. With the aim of extracting quantum signatures of a classically chaotic system, it is shown that an out-of-time-ordered correlator (OTOC) measure precisely captures chaotic/non-chaotic features of the system. The prediction by OTOC is in precise matching with classical chaos quantified by Lyapunov exponent (LE). Furthermore, it is shown that the quantum route corresponding to the semiclassical followed state encounters a dip in single-particle purity within the chaotic phase, depicting a consequence of chaos. A dynamics through the chaotic phase is associated with spreading of many-body quantum state and an irreversible increase in the number of participating adiabatic eigenstates.
