Published August 15, 2007 | Version v1
Journal article Metadata-only

Evolution of large scale curvature fluctuations during the perturbative decay of the inflaton

Creators

  • 1. INAF/IASF-BO, Istituto di Astrofisica Spaziale e Fisica Cosmica di Bologna, Via Gobetti 101, I-40129 Bologna (Italy) and INFN, Sezione di Bologna, Via Irnerio 46, I-40126 Bologna (Italy)
  • 2. INAF/OAB, Osservatorio Astronomico di Bologna, Via Ranzani 1, I-40127 Bologna (Italy) and INFN, Sezione di Bologna, Via Irnerio 46, I-40126 Bologna (Italy)
  • 3. INAF/IASF-BO, Istituto di Astrofisica Spaziale e Fisica Cosmica di Bologna, Via Gobetti 101, I-40129 Bologna (Italy)
  • 4. Dipartimento di Fisica, Universita degli Studi di Bologna and INFN, Via Irnerio 46, I-40126 Bologna (Italy)

Description

We study the evolution of cosmological fluctuations during and after inflation driven by a scalar field coupled to a perfect fluid through a friction term. During the slow-roll regime for the scalar field, the perfect fluid is also frozen and isocurvature perturbations are generated. After the end of inflation, during the decay of the inflaton, we find that a change in the observationally relevant large scale curvature fluctuations is possible

Additional details

Identifiers

DOI
10.1103/PhysRevD.76.043530;
arXiv
arXiv:0705.2185v2;

Publishing Information

Journal Title
Physical Review. D, Particles Fields
Journal Volume
76
Journal Issue
4
Journal Page Range
p. 043530-043530.7
ISSN
0556-2821
CODEN
PRVDAQ

INIS

Country of Publication
United States
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
39049510
Subject category
S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
Descriptors DEI
COSMOLOGY; COUPLING; DECAY; DISTURBANCES; FLUCTUATIONS; FRICTION; IDEAL FLOW; INFLATIONARY UNIVERSE; PERTURBATION THEORY; SCALAR FIELDS
Descriptors DEC
COSMOLOGICAL MODELS; FLUID FLOW; INCOMPRESSIBLE FLOW; MATHEMATICAL MODELS; STEADY FLOW; VARIATIONS

Optional Information

Notes
(c) 2007 The American Physical Society