量子动力学半群渐近态的间接控制
Indirect control of the asymptotic states of a quantum dynamical semigroup
摘要：
在开放量子系统的动力学中，与外部环境的相互作用通常会导致系统的可达状态集随着时间的增加而收缩，最终收缩到单个静止点。在这篇文章中，我们描述了在多大程度上可以通过间接控制来修改这种渐近状态，即当两个系统之间存在纯耗散耦合时，通过使用耦合到目标系统的辅助系统来影响其动态。我们证明，也在这种限制性的情况下，有可能修改相关系统的渐近状态，给出必要条件，并提供物理例子。因此，在间接控制方案中，环境作用不仅对系统的动态特性有负面影响，而且有可能将其用于控制目的。
英文摘要：
In the dynamics of open quantum systems, the interaction with the external environment usually leads to a contraction of the set of reachable states for the system as time increases, eventually shrinking to a single stationary point. In this contribution we describe to what extent it is possible to modify this asymptotic state by means of indirect control, that is by using an auxiliary system coupled to the target system in order to affect its dynamics, when there is a purely dissipative coupling between the two systems. We prove that, also in this restrictive case, it is possible to modify the asymptotic state of the relevant system, give necessary conditions for that and provide physical examples. Therefore, in indirect control schemes, the environmental action has not only a negative impact on the dynamics of a system, it is rather possible to make use of it for control purposes.
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