Cosmological k-essence condensation

We consider a model of dark energy/matter unification based on a k-essence type of theory similar to tachyon condensate models. Using an extension of the general relativistic spherical model which incorporates the effects of both pressure and the acoustic horizon we show that an initially perturbati...

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Bibliographic Details
Published in:arXiv.org 2010-04
Main Authors: Bilic, Neven, Tupper, Gary B, Viollier, Raoul D
Format: Article
Language:English
Subjects:
Cold dark matter
Condensates
Dark energy
Dark matter
Pressure effects
Online Access:Get full text
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Summary:We consider a model of dark energy/matter unification based on a k-essence type of theory similar to tachyon condensate models. Using an extension of the general relativistic spherical model which incorporates the effects of both pressure and the acoustic horizon we show that an initially perturbative k-essence fluid evolves into a mixed system containing cold dark matter like gravitational condensate in significant quantities.
ISSN:2331-8422
DOI:10.48550/arxiv.1004.3141