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arXiv 1407.4178quant-ph
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非马尔可夫量子态扩散方程的微扰方法

Perturbation Methods for Non-Markovian Quantum State Diffusion Equation

Jie Xu, Xinyu Zhao, Jun Jing, Lian-Ao Wu, Ting Yu

摘要:

研究了非马尔可夫量子态扩散方程的两种微扰方法。第一种微扰方法是基于NMQSD方程的功能扩展,而第二种方法则是根据耦合强度扩展NMQSD方程。我们已经比较了两种方法的优点,基于二分系统的两种微扰方法的精度可以通过比较近似与精确解来检查。此外,我们还对一类特殊的系统初态给出了解析解,并在此基础上讨论了纠缠动力学。

英文摘要:

Two perturbation methods for the non-Markovian quantum state diffusion (NMQSD) equation are investigated. The first perturbation method under investigation is based on a functional expansion of the NMQSD equation, while the second one expands the NMQSD equation in terms of the coupling strength. We have compared the advantages of the two methods based on bipartite systems where the accuracy of both perturbation methods can be examined by comparing the approximations with the exact solutions. Additionally, we provide an analytical solution for a special family of system's initial states, and the entanglement dynamics is discussed based on this solution.

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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