Cosmological tachyon condensation

Journal Article · Wed Jul 15 00:00:00 EDT 2009 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.80.023515· OSTI ID:21316203

Bilic, Neven; Tupper, Gary B; Viollier, Raoul D ^[1]

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1. Rudjer Boskovic Institute, 10002 Zagreb (Croatia)

We consider the prospects for dark matter/energy unification in k-essence type cosmologies. General mappings are established between the k-essence scalar field, the hydrodynamic and braneworld descriptions. We develop an extension of the general relativistic dust model that incorporates the effects of both pressure and the associated acoustic horizon. Applying this to a tachyon model, we show that this inhomogeneous 'variable Chaplygin gas' does evolve into a mixed system containing cold dark matter like gravitational condensate in significant quantities. Our methods can be applied to any dark energy model, as well as to mixtures of dark energy and traditional dark matter.

• OSTI ID: 21316203
• Journal Information: Physical Review. D, Particles Fields, Vol. 80, Issue 2; Other Information: DOI: 10.1103/PhysRevD.80.023515; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
BRANES
CONDENSATES
COSMOLOGY
GRAVITATION
MIXTURES
M-THEORY
NONLUMINOUS MATTER
RELATIVISTIC RANGE
SCALAR FIELDS