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arXiv 2006.02358quant-ph
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开放量子系统随时间衰减

Open quantum systems decay across time

Juliane Klatt, Chahan Michael Kropf, Stefan Yoshi Buhmann

摘要:

描述一个开放量子系统的衰变几乎总是需要几个近似,以保持易于处理。在这里,我们首先重新审视的意义,域和看似矛盾的几个最广泛使用的这种近似:半群Markovianity,线性响应理论,维格纳-Weisskopf和行波近似。其次,我们导出了与环境线性耦合的开放量子系统的有效含时衰变理论和相应的广义量子回归关系。这个理论涵盖了所有的时间尺度,并将马尔可夫和线性响应结果作为极限情况。最后,我们将我们的理论应用于量子摩擦现象。

英文摘要:

The description of an open quantum system's decay almost always requires several approximations as to remain tractable. Here, we first revisit the meaning, domain and seeming contradictions of a few of the most widely used of such approximations: semi-group Markovianity, linear response theory, Wigner--Weisskopf and rotating-wave approximation. Secondly, we derive an effective time-dependent decay theory and corresponding generalized quantum regression relations for an open quantum system linearly coupled to an environment. This theory covers all timescales, and subsumes the Markovian and linear-response results as limiting cases. Finally, we apply our theory to the phenomenon of quantum friction.

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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