Bouncing cosmologies in the presence of a Dirac-Born-Infeld field
Abstract
We perform a detailed dynamical system analysis for the behaviour of a Dirac-Born-Infeld (DBI) field in a spatially closed Friedmann-Lema\^itre-Robertson-Walker (FLRW) cosmology. The DBI field is characterised by a potential and brane tension. We study power-law or exponential functions for the potential and tension. We find that in a spatially closed FLRW cosmology, a DBI field in the ultra-relativistic limit allows for a broader range of initial conditions resulting in a bouncing universe than in the non-relativistic limit. We further note that the range of initial conditions allowing for a bounce is larger if we consider power-law functions for the potential and tension, compared to the exponential case. Our dynamical analysis shows that a DBI field does not exhibit stable cyclical behaviour, including the case in which a negative cosmological constant is present.
Keywords
Cite
@article{arxiv.2405.06031,
title = {Bouncing cosmologies in the presence of a Dirac-Born-Infeld field},
author = {Mariam Campbell and Richard Daniel and Peter K. S. Dunsby and Carsten van de Bruck},
journal= {arXiv preprint arXiv:2405.06031},
year = {2024}
}
Comments
18 pages, 5 figures, 3 tables