TY - JOUR
T1 - Non-Gaussian signatures in the cosmic background radiation from warm inflation
AU - Gupta, S.
AU - Berera, A.
AU - Heavens, A. F.
AU - Matarrese, S.
PY - 2002
Y1 - 2002
N2 - We calculate the bispectrum of the gravitational field fluctuations generated during warm inflation, where dissipation of the vacuum potential during inflation is the mechanism for structure formation. The bispectrum is nonzero because of the self-interaction of the scalar field. We compare the predictions with those of standard, or "supercooled," inflationary models, and consider the detectability of these levels of non-Gaussianity in the bispectrum of the cosmic microwave background. We find that the levels of non-Gaussianity for warm and supercooled inflation are comparable, and overridden by the contribution to the bispectrum due to other physical effects. We also conclude that the resulting bispectrum values will be undetectable in the cosmic microwave background for both the MAP and Planck Surveyor satellites.
AB - We calculate the bispectrum of the gravitational field fluctuations generated during warm inflation, where dissipation of the vacuum potential during inflation is the mechanism for structure formation. The bispectrum is nonzero because of the self-interaction of the scalar field. We compare the predictions with those of standard, or "supercooled," inflationary models, and consider the detectability of these levels of non-Gaussianity in the bispectrum of the cosmic microwave background. We find that the levels of non-Gaussianity for warm and supercooled inflation are comparable, and overridden by the contribution to the bispectrum due to other physical effects. We also conclude that the resulting bispectrum values will be undetectable in the cosmic microwave background for both the MAP and Planck Surveyor satellites.
UR - http://www.scopus.com/inward/record.url?scp=0037104595&partnerID=8YFLogxK
U2 - 10.1103/PhysRevD.66.043510
DO - 10.1103/PhysRevD.66.043510
M3 - Article
AN - SCOPUS:0037104595
SN - 0556-2821
VL - 66
JO - Physical Review D, particles, fields, gravitation, and cosmology
JF - Physical Review D, particles, fields, gravitation, and cosmology
IS - 4
M1 - 043510
ER -