Coupled inflation and brane gases

Biswas, Tirthabir and Brandenberger, Robert and A. Easson, Damien and Mazumdar, Anupam (2005) Coupled inflation and brane gases. Physical Review D, 71 (8): 083514. ISSN 1550-7998

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We study an effective four-dimensional theory with an action with two scalar fields minimally coupled to gravity, and with a matter action which couples to the two scalar fields via an overall field-dependent coefficient in the action. Such a theory could arise from a dimensional reduction of supergravity coupled to a gas of branes winding the compactified dimensions. We show the existence of solutions corresponding to power-law inflation. The graceful exit from inflation can be obtained by postulating the decay of the branes, as would occur if the branes are unstable in the vacuum and stabilized at high densities by plasma effects. This construction provides an avenue for connecting string gas cosmology and the late-time universe.

Item Type:
Journal Article
Journal or Publication Title:
Physical Review D
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© 2005 The American Physical Society 11 pages
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Deposited On:
01 May 2013 10:52
Last Modified:
15 Jul 2024 13:45