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arXiv 0707.2579quant-phcond-mat.stat-mechhep-th
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开放量子系统中的动力学不变量和非绝热几何相位

Dynamical invariants and nonadiabatic geometric phases in open quantum systems

M. S. Sarandy, E. I. Duzzioni, M. H. Y. Moussa

摘要:

我们引入一个操作框架来分析非绝热阿贝尔和非阿贝尔,循环和非循环,几何相位在开放量子系统。为了消除绝热性条件,我们将动力学不变量理论推广到任意无卷积主方程下演化的开放系统。几何相位,然后定义通过约旦标准形式的动力学不变量与超运营商,管理主方程。作为一个副产品,我们提供了一个充分条件的相位对一个给定的散肩过程的鲁棒性。我们说明了我们的结果,考虑一个两级系统中的马尔可夫与环境的相互作用,在那里我们表明,非绝热几何相位的系统所获得的可以构造在这样一种方式,它是强大的对失相和自发发射。

英文摘要:

We introduce an operational framework to analyze non-adiabatic Abelian and non-Abelian, cyclic and non-cyclic, geometric phases in open quantum systems. In order to remove the adiabaticity condition, we generalize the theory of dynamical invariants to the context of open systems evolving under arbitrary convolutionless master equations. Geometric phases are then defined through the Jordan canonical form of the dynamical invariant associated with the super-operator that governs the master equation. As a by-product, we provide a sufficient condition for the robustness of the phase against a given decohering process. We illustrate our results by considering a two-level system in a Markovian interaction with the environment, where we show that the non-adiabatic geometric phase acquired by the system can be constructed in such a way that it is robust against both dephasing and spontaneous emission.

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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