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arXiv 1106.5752quant-ph
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多体系统的量子布朗运动及其纠缠动力学

Quantum Brownian motion of multipartite systems and their entanglement dynamics

C. H. Fleming, Albert Roura, B. L. Hu

摘要:

我们求解了N个量子布朗振子在有限温度下线性耦合到量子振子环境的模型,对系统-环境耦合的结构没有额外的假设。使用一个紧凑的相空间形式主义,我们给出了一个相当快速和直接的推导的主方程及其解决方案,一般的光谱功能和任意温度。由于我们的框架本质上是非微扰的,我们能够分析两个振荡器耦合到一个共同的标量场在以前未探索的制度,如非共振和强耦合的纠缠动力学。

英文摘要:

We solve the model of N quantum Brownian oscillators linearly coupled to an environment of quantum oscillators at finite temperature, with no extra assumptions about the structure of the system-environment coupling. Using a compact phase-space formalism, we give a rather quick and direct derivation of the master equation and its solutions for general spectral functions and arbitrary temperatures. Since our framework is intrinsically nonperturbative, we are able to analyze the entanglement dynamics of two oscillators coupled to a common scalar field in previously unexplored regimes, such as off resonance and strong coupling.

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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