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arXiv quant-ph/0702264quant-phhep-th
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紧致空间中热标量场的纠缠

Entanglement of thermal scalar fields in a compact space space

Jae-Weon Lee, Jaewan Kim, Taeseung Choi

摘要:

利用热格林函数方法,我们提出了一种研究任意维时空中真空态或热基态纠缠的一般方法。作为应用,我们证明了1+1维圆柱时空中的质量热标量场真空的量子可分性。证明了分离性使用的积极的部分转置准则的有效双模高斯态的集体运营商。在这种情况下,对于所有质量和温度值,集体算符之间都不存在纠缠。

英文摘要:

Using the thermal Green's function approach we propose a general method to investigate entanglement of the vacuum state or thermal ground states in an arbitrary dimensional space-time. As an application we show quantum separability of the massive thermal scalar field vacuum in the 1+1 dimensional cylindrical space-time. Separability is demonstrated using the positive partial transpose criterion for effective two-mode Gaussian states of collective operators. In this case, for all mass and temperature values entanglement is absent between the collective operators.

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