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Notes on peculiarities of quantum fields in space-times with horizons

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arxiv 2112.02188 v3 pith:VHK2F2ZA submitted 2021-12-03 hep-th gr-qc

Notes on peculiarities of quantum fields in space-times with horizons

classification hep-th gr-qc
keywords horizonsexpectationtensorvaluesnearpeculiaritiesquantumspace-times
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We consider massive scalar field theory on static four-dimensional space-times with horizons. We study the near horizon behaviour of the quantum expectation values of the stress-energy tensor operator for thermal state with generic temperatures. It turns out that the dependence of the expectation values on the temperature and tensor structure of the stress-energy tensor differs from the usual one in the Minkowski space-time. Moreover, for non-canonical temperatures these expectation values are divergent on the horizons. We also show that the Wightman functions have additional infrared peculiarities near the horizons.

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