Curvature force and dark energy

Details Curvature force and dark energy Curvature force and dark energy

2003-02-07

arxiv.org/abs/astro-ph/0302150v3

New.J.Phys.5:85,2003

Astronomy and Astrophysics

Astrophysics

14 pages; references added, to appear in New Journal of Physics (v3)

Scientific paper

10.1088/1367-2630/5/1/385

A curvature self-interaction of the cosmic gas is shown to mimic a cosmological constant or other forms of dark energy, such as a rolling tachyon condensate or a Chaplygin gas. Any given Hubble rate and deceleration parameter can be traced back to the action of an effective curvature force on the gas particles. This force self-consistently reacts back on the cosmological dynamics. The links between an imperfect fluid description, a kinetic description with effective antifriction forces, and curvature forces, which represent a non-minimal coupling of gravity to matter, are established.

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