String Gas Cosmology and Structure Formation: A Brief Review - INSPIRE

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String Gas Cosmology and Structure Formation: A Brief Review

Robert H. Brandenberger
(
- McGill U.
)

Feb, 2007

11 pages

Part of Proceedings, 3rd International Symposium on Cosmological and particle astrophysics (CosPA 2006) : Taipei, Taiwan, November 15-17, 2006

Published in:

Mod.Phys.Lett.A 22 (2007) 1875-1885

Contribution to:

- CosPA 2006

e-Print:

hep-th/0702001 [hep-th]

DOI:

10.1142/S0217732307025091

View in:

ADS Abstract Service

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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.

98.80.Cq
Cosmology
structure formation
string theory
Structure Formation
String Theory
string: gas
inflation
string model
gravitational radiation

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