Journal
PHYSICS LETTERS B
Volume 526, Issue 3-4, Pages 179-185Publisher
ELSEVIER
DOI: 10.1016/S0370-2693(01)01526-X
Keywords
-
Ask authors/readers for more resources
We study density perturbations in several cosmological models motivated by string theory. The evolution and the spectra of curvature perturbations R are analyzed in the ekpyrotic scenario and nonsingular string cosmologies. We find that these string-inspired models generally exhibit blue spectra in contrast to standard slow-roll inflationary scenarios. We also clarify the parameter range where R is enhanced on superhorizon scales. (C) 2002 Elsevier Science B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available