On the presence of twinlike models in cosmology
High Energy Physics - Theory
2012-03-22 v1 General Relativity and Quantum Cosmology
High Energy Physics - Phenomenology
Abstract
We study cosmological models described by a single real scalar field. We work within the first-order framework, and we show how the first-order equations simplify the investigation, leading to a direct search of twinlike theories. The procedure is used to introduce distinct models that support the same first-order equations, with the very same energy densities and pressure in flat spacetime. The presence of curvature forbids the construction of twinlike models in the cosmological scenario here investigated.
Cite
@article{arxiv.1202.5978,
title = {On the presence of twinlike models in cosmology},
author = {D. Bazeia and J. D. Dantas},
journal= {arXiv preprint arXiv:1202.5978},
year = {2012}
}
Comments
4 pages, 2 figures; To appear in PRD