NDLI: Origin of density fluctuations in extended inflation

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Origin of density fluctuations in extended inflation

Content Provider	NASA Technical Reports Server (NTRS)
Author	Kolb, Edward W. Turner, Michael S. Salopek, David S.
Copyright Year	1990
Description	The density fluctuations (both curvature and isocurvature) that arise due to quantum fluctuations in a simple model of extended inflation based upon the Jordan-Brans-Dicke theory are calculated. Curvature fluctuations arise due to quantum fluctuations in the Brans-Dicke field, in general have a nonscale-invariant spectrum, and can have an amplitude that is cosmologically acceptable and interesting without having to tune any coupling constant to a very small value. The density perturbations that arise due to the inflation field are subdominant. If there are other massless fields in the theory, e.g., an axion or an ilion, then isocurvature fluctuations arise in these fields too. Production of gravitational waves and the massless particles associated with excitations of the Brans-Dicke field are also discussed. Several attempts at more realistic models of extended inflation are also analyzed. The importance of the Einstein conformal frame in calculating curvature fluctuations is emphasized. When viewed in this frame, extended inflation closely resembles slow-rollover inflation with an exponential potential and the usual formula for the amplitude of curvature perturbations applies.
File Size	1097120
Page Count	24
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19900016599
Archival Resource Key	ark:/13960/t8z944r4r
Language	English
Publisher Date	1990-05-01
Access Restriction	Open
Subject Keyword	Astrophysics Broken Symmetry Gravitational Waves Astronomical Models Variations Cosmology Excitation Perturbation Density Distribution Curvature Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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