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Dark energy and decompactification in string gas cosmology

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arxiv hep-th/0509225 v2 pith:UQ63L76C submitted 2005-09-29 hep-th astro-phhep-ph

Dark energy and decompactification in string gas cosmology

classification hep-th astro-phhep-ph
keywords energybaryonsstringvacuumcosmologydecompactificationdimensionslead
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We study the stability of extra dimensions in string gas cosmology at late times. Vacuum energy and, interestingly, baryons lead to decompactification after they become dynamically important. The string gas can stabilise the effect of baryons, but not that of vacuum energy. However, we find that the interplay of baryons and strings can lead to acceleration in the visible dimensions, without the need for vacuum energy.

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