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arXiv 2003.08617quant-phcs.SYeess.SY
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非马尔可夫量子系统阻尼率函数辨识的逆系统方法

An inverse-system method for identification of damping rate functions in non-Markovian quantum systems

Shibei Xue, Lingyu Tan, Rebing Wu, Min Jiang, Ian R. Petersen

摘要:

复杂量子环境的辨识是量子工程的核心内容,它系统地构造环境模型,以实现对量子系统的精确控制。在本文中,我们提出了一个逆系统方法来识别阻尼率函数,描述非马尔可夫环境中的时间卷积少的主方程。为了获取环境中的信息,我们将一个有限能级的量子系统耦合到环境中,并测量系统的局部可观测量的时间轨迹。利用充分的测量结果,设计了一种算法,可以同时估计不同耗散通道的多个阻尼率函数。进一步证明了阻尼率函数的可辨识性对应于系统的可逆性,并给出了可辨识性的一个必要条件。我们的方法的有效性在一个原子和三自旋链非马尔可夫系统的例子。

英文摘要:

Identification of complicated quantum environments lies in the core of quantum engineering, which systematically constructs an environment model with the aim of accurate control of quantum systems. In this paper, we present an inverse-system method to identify damping rate functions which describe non-Markovian environments in time-convolution-less master equations. To access information on the environment, we couple a finite-level quantum system to the environment and measure time traces of local observables of the system. By using sufficient measurement results, an algorithm is designed, which can simultaneously estimate multiple damping rate functions for different dissipative channels. Further, we show that identifiability for the damping rate functions corresponds to the invertibility of the system and a necessary condition for identifiability is also given. The effectiveness of our method is shown in examples of an atom and three-spin-chain non-Markovian systems.

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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