期刊
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
卷 -, 期 9, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/1475-7516/2021/09/038
关键词
inflation; quantum cosmology
资金
- Simons Foundation Origins of the Universe program (Modern Inflationary Cosmology collaboration)
By tracing out the environment systematically, we demonstrated the thermalization of out-of-equilibrium states of a light scalar field in a Markovian fashion as perceived by realistic observers. Using the results of Starobinsky and Yokoyama as a case study, we calculated the O(lambda) correction to the relaxation exponents of the lambda phi(4) theory.
The equilibrium state of fields in the causal wedge of a dS observer is thermal, though realistic observers have only partial access to the state. To them, out-of-equilibrium states of a light scalar field appear to thermalize in a Markovian fashion. We show this by formulating a systematic expansion for tracing out the environment. As an example, we calculate the O(lambda) correction to the result of Starobinsky and Yokoyama for the relaxation exponents of lambda phi(4) theory.
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