Hawking radiation as instantons

Chen, Pisin; Sasaki, Misao; Yeom, Dong-han

doi:10.1140/epjc/s10052-019-7138-0

Title: Hawking radiation as instantons

Journal Article · Fri Jul 26 00:00:00 EDT 2019 · European Physical Journal. C, Particles and Fields

DOI:https://doi.org/10.1140/epjc/s10052-019-7138-0· OSTI ID:1560792

Chen, Pisin ^[1]; Sasaki, Misao ^[2];

^[3]

National Taiwan Univ., Taipei (Taiwan); SLAC National Accelerator Lab., Menlo Park, CA (United States); Stanford Univ., CA (United States)
National Taiwan Univ., Taipei (Taiwan); Univ. of Tokyo (Japan); Kyoto Univ. (Japan)
Asia Pacific Center for Theoretical Physics, Pohang (Korea, Republic of); POSTECH, Pohang (Korea, Republic of); Pusan National Univ., Busan (Korea, Republic of)

There have been various interpretations of Hawking radiation proposed based on the perturbative approach, and all have confirmed Hawking’s original finding. One major conceptual challenge of Hawking evaporation is the associated black hole information loss paradox, which remains unresolved. A key factor to the issue is the end-stage of the black hole evaporation. Unfortunately by then the evaporation process becomes non-perturbative. Aspired to provide a tool for the eventual solution to this problem, here we introduce a new interpretation of Hawking radiation as the tunneling of instantons. We study instantons of a massless scalar field in Einstein gravity. We consider a complex-valued instanton that connects an initial pure black hole state to a black hole with a scalar field that represents the Hawking radiation at future null infinity, where its action depends only on the areal entropy difference. By comparing it with several independent approaches to Hawking radiation in the perturbative limit, we conclude that Hawking radiation may indeed be described by a family of instantons. Since the instanton approach can describe non-perturbative processes, we hope that our new interpretation and holistic method may shed lights on the information loss problem.

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Research Organization:: SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC02-76SF00515

OSTI ID:: 1560792

Journal Information:: European Physical Journal. C, Particles and Fields, Vol. 79, Issue 7; ISSN 1434-6044

Publisher:: SpringerCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 12 works

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