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arXiv 1912.09151quant-ph
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耦合到结构化自旋链浴的发射器的马尔可夫性

Markovianity of an emitter coupled to a structured spin chain bath

J. Roos, J. I. Cirac, M. C. Bañuls

摘要:

我们分析了自旋1/2子系统耦合到自旋链的动力学。我们数值模拟的全量子多体系统的各种参数和初始状态的链,并表征子系统动力学的可分性,即它是否是马尔可夫和可以描述的(时间依赖)主方程。我们确定了子系统接受这种马尔科夫描述的状态,尽管是多体环境,并提供了为什么在其他状态中不可能实现同样的情况的见解。有趣的是,在链的边缘而不是中心耦合子系统会产生定性的不同行为。

英文摘要:

We analyze the dynamics of a spin 1/2 subsystem coupled to a spin chain. We simulate numerically the full quantum many-body system for various sets of parameters and initial states of the chain, and characterize the divisibility of the subsystem dynamics, i.e. whether it is Markovian and can be described by a (time dependent) master equation. We identify regimes in which the subsystem admits such Markovian description, despite the many-body setting, and provide insight about why the same is not possible in other regimes. Interestingly, coupling the subsystem at the edge, instead of the center, of the chain gives rise to qualitatively distinct behavior.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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