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arXiv 0909.4023quant-ph
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腔体中两种电磁场模式的渐近纠缠动力学Phase Diagrams

Asymptotic Entanglement Dynamics Phase Diagrams for Two Electromagnetic Field Modes in a Cavity

R. C. Drumond, L. A. M. Souza, M. Terra Cunha

备注：
Published version
发表信息：
Phys. Rev. A 82, 042302 (2010)
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摘要：

从理论上研究了微波谐振腔内双模电磁场的开放动力学。动力学是马尔可夫的，并且由两种类型的储存器确定：由于腔的耗散和温度的“自然”储存器，以及由穿过腔的原子流提供的工程化储存器，如在[Pielawa \emph{et al.} \emph{Phys. Rev. Lett.} \textbf{98}，240401（2007）]中设计的。我们发现，依赖于水库参数，系统可以有不同的“阶段”的渐近纠缠动力学：它可以在有限的时间解开，它可以有持续纠缠大的时间，与它们之间的过渡的特点是渐近解纠缠的可能性。顺便说一下，我们还讨论了耗散对上述文献中提出的产生纠缠态的方案的影响。

英文摘要：

We investigate theoretically an open dynamics for two modes of electromagnetic field inside a microwave cavity. The dynamics is Markovian and determined by two types of reservoirs: the "natural" reservoirs due to dissipation and temperature of the cavity, and an engineered one, provided by a stream of atoms passing trough the cavity, as devised in [Pielawa \emph{et al.} \emph{Phys. Rev. Lett.} \textbf{98}, 240401 (2007)]. We found that, depending on the reservoir parameters, the system can have distinct "phases" for the asymptotic entanglement dynamics: it can disentangle at finite time or it can have persistent entanglement for large times, with the transition between them characterized by the possibility of asymptotical disentanglement. Incidentally, we also discuss the effects of dissipation on the scheme proposed in the above reference for generation of entangled states.

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