String gas cosmology

@article{Battefeld2006StringGC,
  title={String gas cosmology},
  author={T. Battefeld and S. Watson},
  journal={Reviews of Modern Physics},
  year={2006},
  volume={78},
  pages={435-454}
}
A critical review and summary of string gas cosmology is presented. A pedagogical derivation of the effective action starting from string theory, emphasizing the necessary approximations that must be invoked, is included. Working in the effective theory, that at late times it is not possible to stabilize the extra dimensions by a gas of massive string winding modes is demonstrated. Additional string gases are considered that contain so-called enhanced symmetry states. These string gases are… Expand

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References

SHOWING 1-10 OF 139 REFERENCES
Aspects of string-gas cosmology at finite temperature
We study string-gas cosmology in dilaton gravity, inspired by the fact that it naturally arises in a string theory context. Our main interest is the thermodynamical treatment of the string-gas andExpand
The cosmology of massless string modes
We consider the spacetime dynamics of a gas of closed strings in the context of general relativity in a background of arbitrary spatial dimensions. Our motivation is primarily late time string gasExpand
Interaction rates in string gas cosmology
We study string interaction rates in the Brandenberger-Vafa scenario, the very early universe cosmology of a gas of strings. This cosmology starts with the assumption that all spatial dimensions areExpand
Loitering phase in brane gas cosmology
Abstract Brane gas cosmology (BGC) is an approach to M-theory cosmology in which the initial state of the Universe is taken to be small, dense and hot, with all fundamental degrees of freedom nearExpand
Radion stabilization by stringy effects in general relativity
We consider the effects of a gas of closed strings (treated quantum mechanically) on a background where one dimension is compactified on a circle. After we address the effects of a time-dependentExpand
Late-time dynamics of brane gas cosmology
Brane gas cosmology is a scenario inspired by string theory which proposes a simple resolution to the initial singularity problem and gives a dynamical explanation for the number of spatialExpand
Numerical experiments on string cosmology
Abstract We investigate some classical aspects of fundamental strings via numerical experiments. In particular, we study the thermodynamics of a string network within a toroidal universe, as aExpand
Brane gas cosmology in M theory: Late time behavior
We investigate the late-time behavior of a universe containing a supergravity gas and wrapped 2-branes in the context of M theory compactified on ${T}^{10}.$ The supergravity gas tends to driveExpand
Brane gases in the early Universe
Over the past decade it has become clear that fundamental strings are not the only fundamental degrees of freedom in string theory. D-branes are also part of the spectrum of fundamental states. InExpand
Elements of string cosmology
Abstract Aspects of string cosmology for critical and non-critical strings are discussed emphasizing the necessity to account for the dilaton dynamics for a proper incorporation of “large-small”Expand
...
1
2
3
4
5
...