Cosmological tachyon condensation (CROSBI ID 161823)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Bilić, Neven ; Tupper, Gary B. ; Viollier, Raoul D.
engleski
Cosmological tachyon condensation
We consider the prospects for dark matter/energy unification in k-essence type theories. 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.
dark matter; dark energy; Chaplygin gas; tachyon
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Podaci o izdanju
80
2009.
023515-1-023515-11
objavljeno
1550-7998
10.1103/PhysRevD.80.023515