We present a quantum-state-diffusion equation to characterize the dynamics of a generic atomic system due to the coupling to a leaky cavity mode. As quantum resources, the population, the coherence and even the entanglement of the system would gradually leak out of the cavity. The effect from the leakage of the cavity-mode to the uncontrollable degrees of freedom, e.g. environment, is however not always negative to particular applications of these quantum resources. We investigate the competition between these two mechanisms in the framework of the non-Markovian open-quantum-system dynamics, where the leaky mode serves as a general two-layer bosonic environment. Numerical calculations based on our non-perturbative approach reveal a generation of quantum entanglement in the qubit system due to the coupling to a resonant leaky cavity.

中文翻译：

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漏光腔介导的精确纠缠动力学

我们提出了一个量子态扩散方程来表征由于耦合到漏腔模式而导致的一般原子系统的动力学。作为量子资源，系统的总体，相干性甚至纠缠态将逐渐从腔中泄漏出来。但是，从腔模泄漏到不可控制的自由度（例如环境）的影响并不总是对这些量子资源的特定应用不利。我们在非马尔可夫开放量子系统动力学的框架下研究了这两种机制之间的竞争，其中泄漏模式充当了一般的两层玻色子环境。基于我们的非微扰方法的数值计算表明，由于耦合到谐振泄漏腔，量子位系统中产生了量子纠缠。