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arXiv 1310.7650gr-qchep-thquant-ph
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de Sitter时空中量子纠缠的产生

Quantum entanglement generation in de Sitter spacetime

Jiawei Hu, Hongwei Yu

摘要:

在开放量子系统的框架下,研究了de Sitter时空中两个相互独立的静态二能级原子间纠缠的产生。我们把双原子系统看作是一个开放系统,在de Sitter不变真空中与一个起伏的共形耦合无质量标量场相互作用,并推导出控制其演化的主方程。利用部分转置判据,分析了初始可分原子间的纠缠产生,发现deSitter时空中的静态原子在纠缠产生方面表现出与平坦时空中热浴原子不同的特征.因此,原则上,人们可以通过检查在某些情况下两个初始可分离的静态原子之间的纠缠产生来判断他是在热浴中还是在德西特空间中。

英文摘要:

We study, in the framework of open quantum systems, the entanglement generation between two mutually independent static two-level atoms in de Sitter spacetime. We treat the two-atom system as an open system in interaction with a bath of fluctuating conformally coupled massless scalar fields in the de Sitter invariant vacuum and derive the master equation which governs its evolution. With the help of the partial transposition criterion, we analyze entanglement generation between the two initially separable atoms and find that static atoms in de Sitter spacetime exhibit distinct characteristics from those in a thermal bath in flat spacetime in terms of entanglement generation. So, in, principle, one can tell whether he is in a thermal bath or in de Sitter space by checking the entanglement creation between two initially separable static atoms in certain circumstances.

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