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

Title: Standard cosmology delayed

Abstract

The introduction of a delay in the Friedmann equation of cosmological evolution is shown to result in the very early universe undergoing the necessary accelerated expansion in the usual radiation (or matter) dominated phase. Occurring even without a violation of the strong energy condition, this expansion slows down naturally to go over to the decelerated phase, namely the standard Hubble expansion. This may obviate the need for a scalar field driven inflationary epoch.

Authors:
 [1];  [2];  [3]
  1. Department of Physics and Astrophysics, University of Delhi, Delhi 110007 (India)
  2. School of Physical Sciences, Jawaharlal Nehru University, New Delhi 110067 (India)
  3. Centre for Theoretical Physics, Jamia Millia Islamia, New Delhi 110025 (India)
Publication Date:
OSTI Identifier:
22279750
Resource Type:
Journal Article
Journal Name:
Journal of Cosmology and Astroparticle Physics
Additional Journal Information:
Journal Volume: 2012; Journal Issue: 02; 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; COSMOLOGY; FIELD EQUATIONS; INFLATIONARY UNIVERSE; SCALAR FIELDS; UNIVERSE

Citation Formats

Choudhury, Debajyoti, Ghoshal, Debashis, and Sen, Anjan Ananda, E-mail: debajyoti.choudhury@gmail.com, E-mail: dghoshal@mail.jnu.ac.in, E-mail: anjan.ctp@jmi.ac.in. Standard cosmology delayed. United States: N. p., 2012. Web. doi:10.1088/1475-7516/2012/02/046.
Choudhury, Debajyoti, Ghoshal, Debashis, & Sen, Anjan Ananda, E-mail: debajyoti.choudhury@gmail.com, E-mail: dghoshal@mail.jnu.ac.in, E-mail: anjan.ctp@jmi.ac.in. Standard cosmology delayed. United States. doi:10.1088/1475-7516/2012/02/046.
Choudhury, Debajyoti, Ghoshal, Debashis, and Sen, Anjan Ananda, E-mail: debajyoti.choudhury@gmail.com, E-mail: dghoshal@mail.jnu.ac.in, E-mail: anjan.ctp@jmi.ac.in. Wed . "Standard cosmology delayed". United States. doi:10.1088/1475-7516/2012/02/046.
@article{osti_22279750,
title = {Standard cosmology delayed},
author = {Choudhury, Debajyoti and Ghoshal, Debashis and Sen, Anjan Ananda, E-mail: debajyoti.choudhury@gmail.com, E-mail: dghoshal@mail.jnu.ac.in, E-mail: anjan.ctp@jmi.ac.in},
abstractNote = {The introduction of a delay in the Friedmann equation of cosmological evolution is shown to result in the very early universe undergoing the necessary accelerated expansion in the usual radiation (or matter) dominated phase. Occurring even without a violation of the strong energy condition, this expansion slows down naturally to go over to the decelerated phase, namely the standard Hubble expansion. This may obviate the need for a scalar field driven inflationary epoch.},
doi = {10.1088/1475-7516/2012/02/046},
journal = {Journal of Cosmology and Astroparticle Physics},
issn = {1475-7516},
number = 02,
volume = 2012,
place = {United States},
year = {2012},
month = {2}
}