论文标题
用耗散热浴捕获量子相干性
Trapping quantum coherence with a dissipative thermal bath
论文作者
论文摘要
在长期的限制中，据信与耗散环境结合的开放量子系统失去了连贯性，而无需驾驶或测量。违反直觉，我们提供了完全与热浴的两级系统相干性的必要条件。基于时间本地的主方程，只要长时间的羔羊移动对系统过渡频率完全负，即使在高温浴缸下，残基相干性也可以生存。通常在强大甚至超大的耦合方向上满足这种情况，通过升高环境温度可以放松。系统与浴之间的反向旋转相互作用对于残基相干是必不可少的，残基相干受到系统初始状态和浴室结构的影响。
In the long-time limit, an open quantum system coupled to a dissipative environment is believed to lose its coherence without driving or measurement. Counterintuitively, we provide a necessary condition on trapping the coherence of a two-level system entirely with a thermal bath. Based on a time-local master equation, it is found that the residue coherence survives even under a high-temperature bath as long as the long-time Lamb shift is exactly negative to the system transition frequency. This condition is generally met in the strong and even ultrastrong coupling regime that could be relaxed by increasing the environmental temperature. The counter-rotating interactions between system and bath is indispensable to the residue coherence, whose magnitude is affected by the system initial state and the bath structure.
