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arXiv 1406.6989hep-thquant-ph
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全息场论中纠缠负性的讨论

Comments on Entanglement Negativity in Holographic Field Theories

Mukund Rangamani, Massimiliano Rota

摘要:

我们探讨了纠缠负性,一个衡量纠缠包含在量子态,在相对论场论在不同的维度。我们首先给出了一个一般的概述负性及其性质,然后解释了一个众所周知的结果有关(对数)纯量子态的Renyi熵(在指数$1/2$)的负性,通过利用简单的功能纠缠在热态。特别地,我们证明了温度场双态的负性分别由系统在温度$T$和$2\,T$下的自由能差给出。然后,我们使用这个结果来计算在真空状态下的共形场论在各种尺寸的负性,利用文献中的自由和全息CFTs的结果。我们也评论了在全息场论中关于消极性的一般教训。

英文摘要:

We explore entanglement negativity, a measure of the distillable entanglement contained in a quantum state, in relativistic field theories in various dimensions. We first give a general overview of negativity and its properties and then explain a well known result relating (logarithmic) negativity of pure quantum states to the Renyi entropy (at index $1/2$), by exploiting the simple features of entanglement in thermal states. In particular, we show that the negativity of the thermofield double state is given by the free energy difference of the system at temperature $T$ and $2\,T$ respectively. We then use this result to compute the negativity in the vacuum state of conformal field theories in various dimensions, utilizing results that have been derived for free and holographic CFTs in the literature. We also comment upon general lessons to be learnt about negativity in holographic field theories.

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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