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Title: Cosmology of a universe with spontaneously broken Lorentz symmetry

Abstract

A self-consistent effective field theory of modified gravity has recently been proposed with spontaneous breaking of local Lorentz invariance. The symmetry is broken by a vector field with the wrong-sign mass term and it has been shown to have additional graviton modes and modified dispersion relations. In this paper we study the evolution of a homogeneous and isotropic universe in the presence of such a vector field with a minimum lying along the timelike direction. A plethora of different regimes is identified, such as accelerated expansion, loitering, collapse, and tracking.

Authors:
 [1];  [2]; ;  [1];  [3]
  1. Astrophysics and Theoretical Physics, University of Oxford, Denys Wilkinson Building, Keble Road, Oxford OX1 3RH (United Kingdom)
  2. (South Africa)
  3. Astrophysics and Theoretical Physics, University of Oxford, Denys Wilkinson Building, Keble Road, Oxford OX1 3RH (United Kingdom) and Institute for Advanced Studies in Basic Sciences, Gava Zang, P.O.Box 45195-1159 Zanjan (Iran, Republic of)
Publication Date:
OSTI Identifier:
21011079
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. D, Particles Fields; Journal Volume: 75; Journal Issue: 4; Other Information: DOI: 10.1103/PhysRevD.75.044014; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ACCELERATION; COSMOLOGY; DISPERSION RELATIONS; GRAVITATION; GRAVITONS; LORENTZ INVARIANCE; QUANTUM FIELD THEORY; SYMMETRY; SYMMETRY BREAKING; UNIVERSE; VECTOR FIELDS

Citation Formats

Ferreira, P. G., African Institute for Mathematical Sciences, 6-8 Melrose Road, Muizenberg 7945, Gripaios, B. M., Zlosnik, T. G., and Saffari, R.. Cosmology of a universe with spontaneously broken Lorentz symmetry. United States: N. p., 2007. Web. doi:10.1103/PHYSREVD.75.044014.
Ferreira, P. G., African Institute for Mathematical Sciences, 6-8 Melrose Road, Muizenberg 7945, Gripaios, B. M., Zlosnik, T. G., & Saffari, R.. Cosmology of a universe with spontaneously broken Lorentz symmetry. United States. doi:10.1103/PHYSREVD.75.044014.
Ferreira, P. G., African Institute for Mathematical Sciences, 6-8 Melrose Road, Muizenberg 7945, Gripaios, B. M., Zlosnik, T. G., and Saffari, R.. Thu . "Cosmology of a universe with spontaneously broken Lorentz symmetry". United States. doi:10.1103/PHYSREVD.75.044014.
@article{osti_21011079,
title = {Cosmology of a universe with spontaneously broken Lorentz symmetry},
author = {Ferreira, P. G. and African Institute for Mathematical Sciences, 6-8 Melrose Road, Muizenberg 7945 and Gripaios, B. M. and Zlosnik, T. G. and Saffari, R.},
abstractNote = {A self-consistent effective field theory of modified gravity has recently been proposed with spontaneous breaking of local Lorentz invariance. The symmetry is broken by a vector field with the wrong-sign mass term and it has been shown to have additional graviton modes and modified dispersion relations. In this paper we study the evolution of a homogeneous and isotropic universe in the presence of such a vector field with a minimum lying along the timelike direction. A plethora of different regimes is identified, such as accelerated expansion, loitering, collapse, and tracking.},
doi = {10.1103/PHYSREVD.75.044014},
journal = {Physical Review. D, Particles Fields},
number = 4,
volume = 75,
place = {United States},
year = {Thu Feb 15 00:00:00 EST 2007},
month = {Thu Feb 15 00:00:00 EST 2007}
}
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