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arXiv 2012.03305hep-th
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四维黑洞背景下热场双态的注记

Remarks on the thermofield double state in 4D black hole background

Prokopii A. Anempodistov

摘要:

最近的研究表明,对于非正则温度的热态,在具有视界的时空中传播子存在反常奇异性。本文将这些观测推广到背景几何由四维Schwarzschild和Reissner-Nordström黑洞给出的情形。也就是说,我们证明了自由标量场理论中的两点函数在两点位于视界上时具有反常奇异性。这种奇异性是反常的,因为在两点函数中发散项之前的系数不同于正则项,并且明确地依赖于状态的温度。如前所述,当态的温度与视界的正则温度不一致时,它会导致视界上正则化的应力-能量张量的爆炸行为。

英文摘要:

Recently it was shown that there is an anomalous singularity of propagators in spacetimes with horizons for thermal states with non--canonical temperatures. In this paper we extend these observations to the situation when the background geometry is given by the four--dimensional Schwarzschild and Reissner-Nordström black holes. Namely, we demonstrate that the two-point function in the free scalar field theory acquires anomalous singularity when the two points are located on the horizon. This singularity is anomalous in the sense that the coefficient before the divergent term in the two-point function differs from the canonical one and depends explicitly on the temperature of the state. As it was previously shown, it leads to the explosive behavior of the regularised stress-energy tensor on the horizon when the temperature of the state does not coincide with the canonical temperature of the horizon.

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