Continuous measurement of a non-Markovian open quantum system.
Continuous measurement of a non-Markovian open quantum system.
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DOI：
10.1103/physrevlett.112.113601
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发表时间：
2013-07
影响因子：
8.6
通讯作者：
Alireza Shabani;Jan Roden;K. B. Whaley
中科院分区：
文献类型：
--
作者：
Alireza Shabani;Jan Roden;K. B. Whaley
连续量子测量是量子控制、量子计量学和量子信息等各种方法的基础。在这里，我们给出了复杂量子系统色散测量的一般公式。我们将复杂系统描述为一个强耦合到非马尔科夫环境的开放量子系统，从而能够处理各种各样的自然或工程复杂系统。该系统通过耦合到宽带(马尔科夫)储能器的探头谐振器进行监测。在此模型的基础上，我们导出了描述系统在测量记录条件下的退相干动力学的随机层次运动方程的形式。此外，我们还展示了一种基于弱量子测量的光谱方法，以揭示环境的非马尔科夫性质，我们称之为弱光谱。
Continuous quantum measurement is the backbone of various methods in quantum control, quantum metrology, and quantum information. Here, we present a generalized formulation of dispersive measurement of a complex quantum systems. We describe the complex system as an open quantum system that is strongly coupled to a non-Markovian environment, enabling the treatment of a broad variety of natural or engineered complex systems. The system is monitored via a probe resonator coupled to a broadband (Markovian) reservoir. Based on this model, we derive a formalism of stochastic hierarchy equations of motion describing the decoherence dynamics of the system conditioned on the measurement record. Furthermore, we demonstrate a spectroscopy method based on weak quantum measurement to reveal the non-Markovian nature of the environment, which we term weak spectroscopy.