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Instability of de Sitter space under thermal radiation in different vacua

Title
Instability of de Sitter space under thermal radiation in different vacua
Authors
Gong, Jinn-OukSeo, Min-Seok
Ewha Authors
공진욱
SCOPUS Author ID
공진욱scopus
Issue Date
2021
Journal Title
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
ISSN
1475-7516JCR Link
Citation
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, no. 10
Keywords
inflationquantum black holesquantum field theory on curved space
Publisher
IOP Publishing Ltd
Indexed
SCIE; SCOPUS WOS scopus
Document Type
Article
Abstract
We study the instability of de Sitter space-time (dS) under thermal radiation in different vacua. We argue that the mode function solution of a scalar field in four-dimensional dS can be separated into the incoming and outgoing modes. Different vacua for dS are realized by different combinations of positive frequency modes assigned to each solution. For a minimally coupled massless scalar field, we explicitly compute the behavior of the mode function and the corresponding energy-momentum tensor in the Unruh vacuum near the horizon, and find that the horizon area increases (decreases) in time when the incoming (outgoing) mode contributes to thermal flux.
DOI
10.1088/1475-7516/2021/10/042
Appears in Collections:
사범대학 > 과학교육과 > Journal papers
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