Coupled quintessence and the coincidence problem

Details Coupled quintessence and the coincidence problem Coupled quintessence and the coincidence problem

2002-12-22

arxiv.org/abs/astro-ph/0212518v1

Mod.Phys.Lett. A18 (2003) 831-842

Astronomy and Astrophysics

Astrophysics

15 pages, 11 figures

Scientific paper

10.1142/S0217732303009940

We consider a model of interacting cosmological constant/quintessence, where dark matter and dark energy behave as, respectively, two coexisting phases of a fluid, a thermally excited Bose component and a condensate, respectively. In a simple phenomenological model for the dark components interaction we find that their energy density evolution is strongly coupled during the universe evolution. This feature provides a possible way out for the coincidence problem affecting many quintessence models.

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