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arXiv quant-ph/0702055quant-ph
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非马尔可夫量子信道中的纠缠振荡

Entanglement oscillations in non-Markovian quantum channels

Sabrina Maniscalco, Stefano Olivares, Matteo G. A. Paris

摘要:

研究了双模玻色子系统与两个互不关联的热玻色子库相互作用的非马尔可夫动力学。给出了用量子特征函数表示的精确微观Master方程的解,并详细研究了两体高斯态纠缠的动力学性质。特别是,我们分析了短期系统-储层相关性对可分性阈值的影响,并表明相关参数是储层谱密度。如果所涉及的模式的频率是在水库谱密度纠缠持续更长的时间比在马尔可夫信道。另一方面,当水库频谱共振短时关联导致更快的退相干和纠缠振荡的外观。

英文摘要:

We study the non-Markovian dynamics of a two-mode bosonic system interacting with two uncorrelated thermal bosonic reservoirs. We present the solution to the exact microscopic Master equation in terms of the quantum characteristic function and study in details the dynamics of entanglement for bipartite Gaussian states. In particular, we analyze the effects of short-time system-reservoir correlations on the separability thresholds and show that the relevant parameter is the reservoir spectral density. If the frequencies of the involved modes are within the reservoir spectral density entanglement persists for a longer time than in a Markovian channel. On the other hand, when the reservoir spectrum is out of resonance short-time correlations lead to a faster decoherence and to the appearance of entanglement oscillations.

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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