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Bouncing cosmologies in the presence of a Dirac-Born-Infeld field by Campbell, Mariam; Daniel, Richard; Dunsby, Peter K. S.; van de Bruck, Carsten is a scholarly article available to read on EtoBox.

What is Bouncing cosmologies in the presence of a Dirac-Born-Infeld field about?

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.

Author

Campbell, Mariam; Daniel, Richard; Dunsby, Peter K. S.; van de Bruck, Carsten

Published

2024

Language

EN