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arXiv 1012.1392quant-ph
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量子开放系统的强耦合主方程

The strong-coupling master equation of quantum open systems

C. H. Fleming

摘要:

在本文中,我们演示了如何生成连续变量的开放量子系统的强耦合主方程。这是量子布朗粒子的耗散主方程,其中环境噪声比其他系统力更强。我们的强耦合主方程与其他所谓的“强耦合”主方程(例如量子Smoluchowski方程)非常不同,后者扰动了一个极限,其中系统能量被认为是微扰的,因此动力学主要是马尔可夫的。这种近似也要求系统质量渐近大(即使与噪声和感应系统频率的比率相比),因此它们不能完全分类人们可能认为是强耦合的状态。我们的主方程是高度非马尔可夫和根本不同的不同系统的潜力,承认没有明显的通用形式。这一结果非常令人兴奋,因为它为理论探索带来了一个新的领域:强噪声和耗散但非马尔可夫的领域,例如与具有大1/f波动的低温环境的强耦合。

英文摘要:

In this paper we demonstrate how to generate the strong-coupling master equations for open quantum systems of continuous variables. These are the dissipative master equations of quantum Brownian particles for which the environmental noise is stronger than other system forces. Our strong-coupling master equations are very different from other so-called "strong-coupling" master equations (e.g. the quantum Smoluchowski equation) which are perturbing off a limit in which the system energy is taken to be perturbative and thus the dynamics is principally Markovian. Such approximations also require the system mass to be asymptotically large (even as compared to the ratio of noise and induced system frequencies) and thus they do not fully categorize the regime of what one might consider to be strong coupling. Our master equations are highly non-Markovian and radically different for different system potentials, admitting no apparent generic form. This result is quite exciting as it brings forth a new regime for theoretical exploration: the regime of strong noise and dissipation yet non-Markovian, such as strong coupling to a low-temperature environment with large 1/f fluctuations.

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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