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arXiv:2306.07628gr-qc

Comment on "Gravitational Pair Production and Black Hole Evaporation"

Antonio Ferreiro, Jose Navarro-Salas, Silvia Pla

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Abstract

We scrutinize the recent Letter "Gravitational pair production and black hole evaporation" by M.F. Wondrak, W.D. van Suijlekom and H. Falcke [Phys. Rev. Lett. 130, 221502 (2023); arXiv:2305.18521]. We show that some consequences based on the proposed imaginary part of the lowest order effective action are in sharp tension with exact results on pair creation in electrodynamics and cosmology. This casts serious doubt on their claims for particle production in a Schwarzschild spacetime.

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Subjects
gr-qcGeneral Relativity and Quantum Cosmology hep-phHigh Energy Physics, Phenomenology hep-thHigh Energy Physics, Theory

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  1. Universe expected to decay in 10⁷⁸ years, much sooner than previously thought 1 comment

    • It's nonsense. See this comment on their previous paper: https://arxiv.org/abs/2306.07628 The authors of the comment show that the "gravitational pair-production" rate used in the work in OP comes from truncating the covariant heat-kernel (proper-time) expansion of the one-loop…

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