Relic gravity waves from braneworld inflation

Sahni, Varun ; Sami, M. ; Souradeep , Tarun (2001) Relic gravity waves from braneworld inflation Physical Review D - Particles, Fields, Gravitation and Cosmology, 65 (2). 023518_1-023518_16. ISSN 1550-7998

Full text not available from this repository.

Official URL: http://prd.aps.org/abstract/PRD/v65/i2/e023518

Related URL: http://dx.doi.org/10.1103/PhysRevD.65.023518

Abstract

We discuss a scenario in which extra dimensional effects allow a scalar field with a steep potential to play the dual role of the inflaton as well as dark energy (quintessence). The post-inflationary evolution of the universe in this scenario is generically characterized by a "kinetic regime" during which the kinetic energy of the scalar field greatly exceeds its potential energy resulting in a "stiff" equation of state for scalar field matter Pφ≃ρφ. The kinetic regime precedes the radiation dominated epoch and introduces an important new feature into the spectrum of relic gravity waves created quantum mechanically during inflation. The amplitude of the gravity wave spectrum increases with the wave number for wavelengths shorter than the comoving horizon scale at the commencement of the radiative regime. This "blue tilt" is a generic feature of models with steep potentials and imposes strong constraints on a class of inflationary braneworld models. Prospects for detection of the gravity wave background by terrestrial and space-borne gravity wave observatories such as LIGO II and LISA are discussed.

Item Type:Article
Source:Copyright of this article belongs to The American Physical Society.
ID Code:45615
Deposited On:28 Jun 2011 04:39
Last Modified:28 Jun 2011 04:39

Repository Staff Only: item control page