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arXiv 1111.4481quant-ph
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开放量子系统动力学中的非局域记忆效应

Nonlocal memory effects in the dynamics of open quantum systems

Elsi-Mari Laine, Heinz-Peter Breuer, Jyrki Piilo, Chuan-Feng Li, Guang-Can Guo

摘要:

我们探讨了通过局域系统与环境相互作用生成开放量子系统非局域动力学映射的可能性。采用一个通用的退相干过程引起的局部相互作用哈密顿量,我们表明,在复合环境中的初始相关性可以导致一个非局部的开放系统动力学表现出很强的记忆效应,虽然当地的动态是马尔可夫。在两个纠缠光子与两个退相环境相互作用的模型中,我们发现记忆效应的程度与初始环境状态中的相关性之间存在直接联系。结果表明,与传统的智慧,扩大一个开放的系统可以改变的动力学从马尔可夫到非马尔可夫。

英文摘要:

We explore the possibility to generate nonlocal dynamical maps of an open quantum system through local system-environment interactions. Employing a generic decoherence process induced by a local interaction Hamiltonian, we show that initial correlations in a composite environment can lead to a nonlocal open system dynamics which exhibits strong memory effects although the local dynamics is Markovian. In a model of two entangled photons interacting with two dephasing environments we find a direct connection between the degree of memory effects and the amount of correlations in the initial environmental state. The results demonstrate that, contrary to conventional wisdom, enlarging an open system can change the dynamics from Markovian to non-Markovian.

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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