Thermal fluctuations of dark matter in bouncing cosmology

We investigate the statistical nature of the dark matter particles produced in bouncing cosmology, especially, the evolution of its thermal fluctuations. By explicitly deriving and solving the equation of motion of super-horizon mode, we fully determine the evolution of thermal perturbation of dark...

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Bibliographic Details
Published in:Journal of cosmology and astroparticle physics 2016-09, Vol.2016 (9), p.38-38
Main Author: Li, Changhong
Format: Article
Language:English
Subjects:
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
COSMOLOGICAL INFLATION
COSMOLOGY
DISTURBANCES
EQUATIONS OF MOTION
EVOLUTION
FLUCTUATIONS
NONLUMINOUS MATTER
PERTURBATION THEORY
UNIVERSE
WIMPS
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Summary:We investigate the statistical nature of the dark matter particles produced in bouncing cosmology, especially, the evolution of its thermal fluctuations. By explicitly deriving and solving the equation of motion of super-horizon mode, we fully determine the evolution of thermal perturbation of dark matter in a generic bouncing background. And we also show that the evolution of super-horizon modes is stable and will not ruin the background evolution of a generic bouncing universe till the Planck scale. Given no super-horizon thermal perturbation of dark matter appears in standard inflation scenario such as WIMP(-less) miracles, such super-horizon thermal perturbation of dark matter generated during the generic bouncing universe scenario may be significant for testing and distinguishing these two scenario in near future.
ISSN:1475-7516
1475-7516
DOI:10.1088/1475-7516/2016/09/038