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Suppression of Bekenstein-Hawking radiation in f(T)-gravity

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arxiv 1707.02874 v1 pith:O7MEH37T submitted 2017-07-10 gr-qc hep-th

Suppression of Bekenstein-Hawking radiation in f(T)-gravity

classification gr-qc hep-th
keywords bekenstein-hawkingradiationchoiceevaporationgravityinstabilitiesnariaisemiclassical
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We discuss semiclassical Nariai black holes in the framework of $f(T)$-gravity. For a diagonal choice of tetrades, stable Nariai metrics can be found, emitting Bekenstein-Hawking radiation in semiclassical limit. However, for a non-diagonal choice of tetrades, evaporation and antievaporation instabilities are turned on. In turn, this causes a back-reaction effect suppressing the Bekenstein-Hawking radiation. In particular, evaporation instabilities produce a new radiation -- different by Bekenstein-Hawking emission -- non-violating unitarity in particle physics sector.

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