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Title: Modulated decay in the multi-component Universe

The early Universe after inflation may have oscillations, kinations (nonoscillatory evolution of a field), topological defects, relativistic and non-relativistic particles at the same time. The Universe whose energy density is a sum of those components can be called the multi-component Universe. The components, which may have distinguishable density scalings, may decay modulated. In this paper we study generation of the curvature perturbations caused by the modulated decay in the multi-component Universe.
Authors:
 [1] ;  [2] ;  [3]
  1. Department of Physics, Nagoya University, Nagoya 464-8602 (Japan)
  2. Cosmophysics group, Theory Center, IPNS, KEK, and The Graduate University for Advanced Study (Sokendai), Tsukuba 305-0801 (Japan)
  3. Laboratory of Physics, Saitama Institute of Technology, Fukaya, Saitama 369-0293 (Japan)
Publication Date:
OSTI Identifier:
22282739
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2013; Journal Issue: 08; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; COSMOLOGY; DECAY; DENSITY; ENERGY DENSITY; EVOLUTION; INFLATIONARY UNIVERSE; INFLATONS; OSCILLATIONS; PERTURBATION THEORY; RELATIVISTIC RANGE; TOPOLOGY