Generalised DBI-Quintessence

Details Generalised DBI-Quintessence Generalised DBI-Quintessence

2009-04-03

arxiv.org/abs/0904.0472v1

Phys.Rev.D80:023528,2009

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

33 pages, lots of figures

Scientific paper

10.1103/PhysRevD.80.023528

We investigate the phase space of a quintessence theory governed by a generalised version of the DBI action, using a combination of numeric and analytic methods. The additional degrees of freedom lead to a vastly richer phase space structure, where the field covers the full equation of state parameter space; $-1 \le \omega \le 1$. We find many non-trivial solution curves to the equations of motion which indicate that DBI quintessence is an interesting candidate for a viable k-essence model.

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