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arXiv · hep-th/0702001

String Gas Cosmology and Structure Formation - A Brief Review

Robert Brandenberger
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Abstract

For suitable cosmological backgrounds, thermal fluctuations of a gas of strings can generate a scale-invariant spectrum of cosmological fluctuations without requiring a phase of inflationary expansion. We highlight the key points of this mechanism, and discuss cosmological backgrounds in which this scenario can be realized. The spectrum of cosmological perturbations has a small red tilt (like in scalar field-driven inflation) but (unlike in inflation) there is a small blue tilt of the spectrum of gravitational waves.

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Robert Brandenberger. 2007-01-31. String Gas Cosmology and Structure Formation - A Brief Review. https://doi.org/10.1142/s0217732307025091

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