Antisymmetric field in string gas cosmology
arXiv:1007.1521 · doi:10.1103/PhysRevD.82.126005
Abstract
We study how the introduction of a 2-form field flux modify the dynamics of a T-duality invariant string gas cosmology model of Greene, Kabat and Marnerides. It induces a repulsive potential term in the effective action for the scale factor of the spacial dimensions. Without the 2-form field flux, the universe fails to expand when the pressure due to string modes vanishes. With the presence of a homogeneous 2-form field flux, it propels 3 spacial dimensions to grow into a macroscopic 4 dimensional space-time. We find that it triggers an expansion of a universe away from the oscillating phase around the self-dual radius. We also investigate the effects of a constant 2-form field. We can obtain an expanding 4 dimensional space-time by tuning it at the critical value.
arXiv comment23 pages, 12 figures
References in corpus (25)
- Superstring Cosmology
- Elements of String Cosmology
- Space-Time Structures from IIB Matrix Model
- Brane Gases in the Early Universe
- String Gas Cosmology
- Dilaton, winding modes and cosmological solutions
- String Cosmology with a Time-Dependent Antisymmetric Tensor Potential
- Cosmological String Gas on Orbifolds
- Numerical Experiments in String Cosmology
- Aspects of String-Gas Cosmology at Finite Temperature
- Isotropization in Brane Gas Cosmology
- Brane Gases on K3 and Calabi-Yau Manifolds
- Effective Actions of Matrix Models on Homogeneous Spaces
- Brane gases in the early universe: thermodynamics and cosmology
- String-Dominated Cosmology
- String Theory in Electromagnetic Fields
- Late cosmology of brane gases with a two-form field
- String Cosmology and the Dimension of Spacetime
- String windings in the early universe
- Geometric Precipices in String Cosmology
- Bouncing and cyclic string gas cosmologies
- Asymptotic cosmological solutions for string/brane gases with solitonic fluxes
- Dynamical Decompactification and Three Large Dimensions
- The target space dependence of the Hagedorn temperature
- The Relic Problem of String Gas Cosmology