论文标题
非马克维亚环境中的经典驾驶量子同步
Classical-driving-assisted quantum synchronization in non-Markovian environments
论文作者
论文摘要
我们研究了耦合到结构化环境的驱动的两级系统（TLS）的量子相同步，并证明可以通过经典驾驶场来增强量子同步。我们使用Husimi $ Q $功能来表征相位的偏好，并在相图中找到同相和反相锁定现象。值得注意的是，我们表明经典驾驶使TLS能够在马尔可夫政权中达到稳定的反相锁定。但是，我们发现，经典驾驶和非马克维亚效应的协同作用显着增强了初始同相锁定。通过引入$ S $功能及其最大值以量化同步的强度并勾勒出同步区域，我们可以在同步参数区域中观察到空心的Arnold舌头的典型特征。在空心的Arnold舌头中，同步区域都存在于舌头内外，而非同步区域仅位于边界线上。我们还通过使用Quasimode理论对上述结果提供了直观的解释。
We study the quantum phase synchronization of a driven two-level system (TLS) coupled to a structured environment and demonstrate that quantum synchronization can be enhanced by the classical driving field. We use the Husimi $Q$-function to characterize the phase preference and find the in-phase and anti-phase locking phenomenon in the phase diagram. Remarkably, we show that the in-phase classical driving enables a TLS to reach stable anti-phase locking in the Markovian regime. However, we find that the synergistic action of classical driving and non-Markovian effects significantly enhances the initial in-phase locking. By introducing the $S$-function and its maximal value to quantify the strength of synchronization and sketch the synchronization regions, we observe the typical signatures of the hollowed Arnold tongue in the parameter regions of synchronization. In the hollowed Arnold tongue, the synchronization regions exist both inside and outside the tongue while unsynchronized regions only lie on the boundary line. We also provide an intuitive interpretation of the above results by using the quasimode theory.
