# UV Perturbations in Brane Gas Cosmology

@article{Watson2004UVPI, title={UV Perturbations in Brane Gas Cosmology}, author={Scott Watson}, journal={Physical Review D}, year={2004}, volume={70}, pages={023516} }

We consider the effect of the ultraviolet (UV) or short wavelength modes on the background of Brane Gas Cosmology. We find that the string matter sources are negligible in the UV and that the evolution is given primarily by the dilaton perturbation. We also find that the linear perturbations are well behaved and the predictions of Brane Gas Cosmology are robust against the introduction of linear perturbations. In particular, we find that the stabilization of the extra dimensions (moduli…

## 20 Citations

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## References

SHOWING 1-10 OF 24 REFERENCES

### Linear Perturbations in Brane Gas Cosmology

- Physics
- 2003

We consider the effect of string inhomogeneities on the time dependent background of Brane Gas Cosmology. We derive the equations governing the linear perturbations of the dilaton-gravity background…

### On T-Duality in Brane Gas Cosmology

- Physics
- 2003

In the context of homogeneous and isotropic superstring cosmology, the T-duality symmetry of string theory has been used to argue that for a background space?time described by dilaton gravity with…

### On winding branes and cosmological evolution of extra dimensions in string theory

- Physics
- 2003

We consider evolution of compact extra dimensions in cosmology and try to see whether wrapped branes can prevent the expansion of the internal space. Some difficulties of the Brandenberger and Vafa…

### Inflation and brane gases

- Physics
- 2004

We investigate a new way of realizing a period of cosmological inflation in the context of brane gas cosmology. It is argued that a gas of co-dimension one branes, out of thermal equilibrium with the…

### Isotropization in Brane Gas Cosmology

- Physics
- 2003

Brane Gas Cosmology (BGC) is an approach to unifying string theory and cosmology in which matter is described by a gas of strings and branes in a dilaton gravity background. The Universe is assumed…

### Brane gas cosmology in M theory: Late time behavior

- Physics
- 2003

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 drive…

### Aspects of string-gas cosmology at finite temperature

- Physics
- 2003

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 and…