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Title: Some cosmological consequences of Weyl invariance

Abstract

We examine some Weyl invariant cosmological models in the framework of generalized dilaton gravity, in which the action is made of a set of N conformally coupled scalar fields. It will be shown that when the FRW ansatz for the spacetime metric is assumed, the Ward identity for conformal invariance guarantees that the gravitational equations hold whenever the scalar fields EM do so. It follows that any scale factor can solve the theory provided a non-trivial profile for a dilaton field. In particular, accelerated expansion is a natural solution to the full set of equations.

Authors:
; ;  [1]
  1. Departamento de Física Teórica and Instituto de Física Teórica, IFT-UAM/CSIC, Universidad Autónoma, 20849 Madrid (Spain)
Publication Date:
OSTI Identifier:
22525937
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2015; Journal Issue: 03; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; CONFORMAL INVARIANCE; COSMOLOGICAL MODELS; DILATONS; FIELD EQUATIONS; GRAVITATION; GRAVITATIONAL FIELDS; MATHEMATICAL SOLUTIONS; METRICS; SCALAR FIELDS; SPACE-TIME; WARD IDENTITY; WEYL UNIFIED THEORY

Citation Formats

Alvarez, Enrique, González-Martín, Sergio, and Herrero-Valea, Mario, E-mail: enrique.alvarez@uam.es, E-mail: sergio.gonzalez.martin@csic.es, E-mail: mario.herrero@csic.es. Some cosmological consequences of Weyl invariance. United States: N. p., 2015. Web. doi:10.1088/1475-7516/2015/03/035.
Alvarez, Enrique, González-Martín, Sergio, & Herrero-Valea, Mario, E-mail: enrique.alvarez@uam.es, E-mail: sergio.gonzalez.martin@csic.es, E-mail: mario.herrero@csic.es. Some cosmological consequences of Weyl invariance. United States. doi:10.1088/1475-7516/2015/03/035.
Alvarez, Enrique, González-Martín, Sergio, and Herrero-Valea, Mario, E-mail: enrique.alvarez@uam.es, E-mail: sergio.gonzalez.martin@csic.es, E-mail: mario.herrero@csic.es. Sun . "Some cosmological consequences of Weyl invariance". United States. doi:10.1088/1475-7516/2015/03/035.
@article{osti_22525937,
title = {Some cosmological consequences of Weyl invariance},
author = {Alvarez, Enrique and González-Martín, Sergio and Herrero-Valea, Mario, E-mail: enrique.alvarez@uam.es, E-mail: sergio.gonzalez.martin@csic.es, E-mail: mario.herrero@csic.es},
abstractNote = {We examine some Weyl invariant cosmological models in the framework of generalized dilaton gravity, in which the action is made of a set of N conformally coupled scalar fields. It will be shown that when the FRW ansatz for the spacetime metric is assumed, the Ward identity for conformal invariance guarantees that the gravitational equations hold whenever the scalar fields EM do so. It follows that any scale factor can solve the theory provided a non-trivial profile for a dilaton field. In particular, accelerated expansion is a natural solution to the full set of equations.},
doi = {10.1088/1475-7516/2015/03/035},
journal = {Journal of Cosmology and Astroparticle Physics},
number = 03,
volume = 2015,
place = {United States},
year = {Sun Mar 01 00:00:00 EST 2015},
month = {Sun Mar 01 00:00:00 EST 2015}
}