Brane Gas Cosmology and Loitering
In Brane Gas Cosmology (BGC) the initial state of the universe is taken to be small, dense and hot, with all fundamental degrees of freedom near thermal equilibrium. This starting point is in close analogy with the Standard Big Bang (SBB) model. In the simplest example, the topology of the universe...
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ftdatacite:10.48550/arxiv.hep-th/0111055 2023-05-15T18:07:41+02:00 Brane Gas Cosmology and Loitering Easson, Damien A. 2001 https://dx.doi.org/10.48550/arxiv.hep-th/0111055 https://arxiv.org/abs/hep-th/0111055 unknown arXiv Assumed arXiv.org perpetual, non-exclusive license to distribute this article for submissions made before January 2004 http://arxiv.org/licenses/assumed-1991-2003/ High Energy Physics - Theory hep-th Astrophysics astro-ph General Relativity and Quantum Cosmology gr-qc FOS Physical sciences Preprint Article article CreativeWork 2001 ftdatacite https://doi.org/10.48550/arxiv.hep-th/0111055 2022-04-01T16:51:40Z In Brane Gas Cosmology (BGC) the initial state of the universe is taken to be small, dense and hot, with all fundamental degrees of freedom near thermal equilibrium. This starting point is in close analogy with the Standard Big Bang (SBB) model. In the simplest example, the topology of the universe is assumed to be toroidal in all nine spatial dimensions and is filled with a gas of $p$-branes. The dynamics of winding modes allow, at most, three spatial dimensions to become large, providing a possible explanation to the origin of our macroscopic (3+1)-dimensional universe. Specific solutions are found within the model that exhibit loitering, i.e. the universe experiences a short phase of slow contraction during which the Hubble radius grows larger than the physical extent of the universe. This phase is studied by combining the dilaton gravity background equations of motion with equations that determine the annihilation of string winding modes into string loops. Loitering provides a solution to the brane problem (generalised domain wall problem) in BGC and the horizon problem of the SBB scenario. In BGC the initial singularity problem of the SBB scenario is solved, without relying on an inflationary phase due to the presence of the T-duality symmetry in the theory. : Invited talk at COSMO-01 Workshop, Rovaniemi, Finland, August 30 - September 4, 2001; 25 pages, LaTeX, 6 eps figures Report Rovaniemi DataCite Metadata Store (German National Library of Science and Technology) Hubble ENVELOPE(158.317,158.317,-80.867,-80.867) Rovaniemi ENVELOPE(26.159,26.159,66.392,66.392) |
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DataCite Metadata Store (German National Library of Science and Technology) |
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High Energy Physics - Theory hep-th Astrophysics astro-ph General Relativity and Quantum Cosmology gr-qc FOS Physical sciences |
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High Energy Physics - Theory hep-th Astrophysics astro-ph General Relativity and Quantum Cosmology gr-qc FOS Physical sciences Easson, Damien A. Brane Gas Cosmology and Loitering |
topic_facet |
High Energy Physics - Theory hep-th Astrophysics astro-ph General Relativity and Quantum Cosmology gr-qc FOS Physical sciences |
description |
In Brane Gas Cosmology (BGC) the initial state of the universe is taken to be small, dense and hot, with all fundamental degrees of freedom near thermal equilibrium. This starting point is in close analogy with the Standard Big Bang (SBB) model. In the simplest example, the topology of the universe is assumed to be toroidal in all nine spatial dimensions and is filled with a gas of $p$-branes. The dynamics of winding modes allow, at most, three spatial dimensions to become large, providing a possible explanation to the origin of our macroscopic (3+1)-dimensional universe. Specific solutions are found within the model that exhibit loitering, i.e. the universe experiences a short phase of slow contraction during which the Hubble radius grows larger than the physical extent of the universe. This phase is studied by combining the dilaton gravity background equations of motion with equations that determine the annihilation of string winding modes into string loops. Loitering provides a solution to the brane problem (generalised domain wall problem) in BGC and the horizon problem of the SBB scenario. In BGC the initial singularity problem of the SBB scenario is solved, without relying on an inflationary phase due to the presence of the T-duality symmetry in the theory. : Invited talk at COSMO-01 Workshop, Rovaniemi, Finland, August 30 - September 4, 2001; 25 pages, LaTeX, 6 eps figures |
format |
Report |
author |
Easson, Damien A. |
author_facet |
Easson, Damien A. |
author_sort |
Easson, Damien A. |
title |
Brane Gas Cosmology and Loitering |
title_short |
Brane Gas Cosmology and Loitering |
title_full |
Brane Gas Cosmology and Loitering |
title_fullStr |
Brane Gas Cosmology and Loitering |
title_full_unstemmed |
Brane Gas Cosmology and Loitering |
title_sort |
brane gas cosmology and loitering |
publisher |
arXiv |
publishDate |
2001 |
url |
https://dx.doi.org/10.48550/arxiv.hep-th/0111055 https://arxiv.org/abs/hep-th/0111055 |
long_lat |
ENVELOPE(158.317,158.317,-80.867,-80.867) ENVELOPE(26.159,26.159,66.392,66.392) |
geographic |
Hubble Rovaniemi |
geographic_facet |
Hubble Rovaniemi |
genre |
Rovaniemi |
genre_facet |
Rovaniemi |
op_rights |
Assumed arXiv.org perpetual, non-exclusive license to distribute this article for submissions made before January 2004 http://arxiv.org/licenses/assumed-1991-2003/ |
op_doi |
https://doi.org/10.48550/arxiv.hep-th/0111055 |
_version_ |
1766179902517673984 |