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arXiv quant-ph/0210054quant-ph
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开放的量子系统环境

Open environments for quantum open systems

Michael R. Gallis

摘要:

文献中的大多数量子开放系统模型都是简单的,因为它们只明确地解释了与感兴趣的系统直接相互作用的那部分环境。在弱耦合极限下,利用投影算符方法研究了具有开放环境的量子开放系统。环境的开放性由Lindblad形式的非幺正演化来模拟。在某些条件下,所得到的主方程的系统是不敏感的初始状态的环境和初始纠缠系统和环境之间的时间尺度大于环境松弛时间尺度。对于由谐振子浴组成的环境的特定情况下,所得到的主方程被证明具有完全正演化的代数形式。开放环境模型示出了系统线性耦合到振荡器浴的特定情况。

英文摘要:

The majority of quantum open system models in the literature are simplistic in the sense that they only explicitly account for that part of the environment that directly interacts with the system of interest. A quantum open system with an open environment is examined using the projection operator method in the weak coupling limit. The openness of environment is modelled by nonunitary evolution of the Lindblad form. Under certain conditions, the resulting master equation for the system is insensitive to the initial state of the environment and to initial entanglements between the system and environment for time scales greater than the environment relaxation timescales. For the particular case of an environment consisting of a harmonic oscillator bath, the resulting master equations are demonstrated to have the algebraic form for completely positive evolution. The open environment model is illustrated for the particular case of a system linearly coupled to an oscillator bath.

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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