skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: On the initial regime of pre-big bang cosmology

Abstract

The production of a background of super-horizon curvature perturbations with the appropriate (red) spectrum needed to trigger the cosmic anisotropies observed on large scales is associated, in the context of pre-big bang inflation, with a phase of growing string coupling. The extension towards the past of such a phase is not limited in time by the dynamical backreaction of the quantum perturbations of the cosmological geometry and of its sources. A viable, slightly red spectrum of scalar perturbations can thus be the output of an asymptotic, perturbative regime which is well compatible with an initial string-vacuum state satisfying the postulate of 'Asymptotic Past Triviality'.

Authors:
 [1]
  1. Dipartimento di Fisica, Università di Bari, Via G. Amendola 173, 70126 Bari (Italy)
Publication Date:
OSTI Identifier:
22667708
Resource Type:
Journal Article
Journal Name:
Journal of Cosmology and Astroparticle Physics
Additional Journal Information:
Journal Volume: 2017; Journal Issue: 09; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1475-7516
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ANISOTROPY; ASYMPTOTIC SOLUTIONS; COMPUTERIZED SIMULATION; COSMOLOGY; COUPLING; DISTURBANCES; INFLATIONARY UNIVERSE; PERTURBATION THEORY; SPECTRA

Citation Formats

Gasperini, M., E-mail: gasperini@ba.infn.it. On the initial regime of pre-big bang cosmology. United States: N. p., 2017. Web. doi:10.1088/1475-7516/2017/09/001.
Gasperini, M., E-mail: gasperini@ba.infn.it. On the initial regime of pre-big bang cosmology. United States. doi:10.1088/1475-7516/2017/09/001.
Gasperini, M., E-mail: gasperini@ba.infn.it. Fri . "On the initial regime of pre-big bang cosmology". United States. doi:10.1088/1475-7516/2017/09/001.
@article{osti_22667708,
title = {On the initial regime of pre-big bang cosmology},
author = {Gasperini, M., E-mail: gasperini@ba.infn.it},
abstractNote = {The production of a background of super-horizon curvature perturbations with the appropriate (red) spectrum needed to trigger the cosmic anisotropies observed on large scales is associated, in the context of pre-big bang inflation, with a phase of growing string coupling. The extension towards the past of such a phase is not limited in time by the dynamical backreaction of the quantum perturbations of the cosmological geometry and of its sources. A viable, slightly red spectrum of scalar perturbations can thus be the output of an asymptotic, perturbative regime which is well compatible with an initial string-vacuum state satisfying the postulate of 'Asymptotic Past Triviality'.},
doi = {10.1088/1475-7516/2017/09/001},
journal = {Journal of Cosmology and Astroparticle Physics},
issn = {1475-7516},
number = 09,
volume = 2017,
place = {United States},
year = {2017},
month = {9}
}