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arXiv 1101.2668quant-ph
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利用动态生成的系统-环境相关性的初始状态准备

Initial state preparation with dynamically generated system-environment correlations

C. H. Fleming, B. L. Hu, Albert Roura

摘要:

开放量子系统的动力学对系统和环境之间初始关联的依赖性是一个非常重要但却知之甚少的课题。为了技术上的方便,大多数先前的研究假设可因子分解的初始状态,其中系统和它的环境是不相关的,但这些条件是不太现实的,并引起特殊的行为。一个明显的特征是在系统与其环境接触之后立即快速建立或突然震动物理量。其根本原因是系统与环境之间的关联性和耦合性初始失衡。在这篇文章中,我们明确地展示了如何通过适当调整相关性和/或耦合来避免这些非物理行为,用于理论和实验兴趣的设置。我们提供简单的分析结果,出现在线性(而不是仿射)主方程因式分解的初始状态的数量。

英文摘要:

The dependence of the dynamics of open quantum systems upon initial correlations between the system and environment is an utterly important yet poorly understood subject. For technical convenience most prior studies assume factorizable initial states where the system and its environments are uncorrelated, but these conditions are not very realistic and give rise to peculiar behaviors. One distinct feature is the rapid build up or a sudden jolt of physical quantities immediately after the system is brought in contact with its environments. The ultimate cause of this is an initial imbalance between system-environment correlations and coupling. In this note we demonstrate explicitly how to avoid these unphysical behaviors by proper adjustments of correlations and/or the coupling, for setups of both theoretical and experimental interest. We provide simple analytical results in terms of quantities that appear in linear (as opposed to affine) master equations derived for factorized initial states.

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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