# String windings in the early universe

@article{Easther2005StringWI, title={String windings in the early universe}, author={Richard Easther and Brian Randolph Greene and Mark G. Jackson and Daniel Kabat}, journal={Journal of Cosmology and Astroparticle Physics}, year={2005}, volume={2005}, pages={009 - 009} }

We study string dynamics in the early universe. Our motivation is the proposal of Brandenberger and Vafa that string winding modes may play a key role in decompactifying three spatial dimensions. We model the universe as a homogeneous but anisotropic nine-torus filled with a gas of excited strings. We adopt initial conditions which fix the dilaton and the volume of the torus, but otherwise assume all states are equally likely. We study the evolution of the system both analytically and…

## 115 Citations

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## References

SHOWING 1-10 OF 46 REFERENCES

### Brane gases in the early Universe

- Physics
- 2000

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. In…

### Late-time dynamics of brane gas cosmology

- Physics
- 2003

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 spatial…

### Cosmological String Gas on Orbifolds

- Physics, Mathematics
- 2002

It has long been known that strings wound around incontractible cycles can play a vital role in cosmology. In particular, in a spacetime with toroidal spatial hypersurfaces, the dynamics of the…

### 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…

### Dynamical decompactification from brane gases in eleven-dimensional supergravity

- Physics
- 2005

Brane gas cosmology provides a dynamical decompactification mechanism that could account for the number of spacetime dimensions we observe today. In this work we discuss this scenario taking into…

### 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…

### DILATON STABILIZATION IN BRANE GAS COSMOLOGY

- Physics
- 2004

Brane Gas Cosmology is an M-theory motivated attempt to reconcile aspects of the standard cosmology based on Einstein's theory of general relativity. Dilaton gravity, when incorporating winding…