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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 2:13 |
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Conference: Bucharest University Faculty of Physics 2024 Meeting
Section: Theoretical and Computational Physics, High-Energy Physics, Applied Mathematics
Title:
Brane Gas Cosmology with Compact Time
Authors:
Rădoacă-Dogaru Andrei-Ioan
*
Affiliation:
University of Bucharest, Faculty of Physics
E-mail
andrei.dog95@yahoo.com
Keywords:
cosmology, branes, T-duality
Abstract:
Brane Gas Cosmology (BGC) is a well-known proposal to explain the dimensionality of spacetime and resolve the initial singularity of the Big Bang Model, among other features, starting from a compact (9+1)-dimensional universe populated by strings and membranes of various dimensions, in thermodynamic equilibrium. The main mechanism for the decompactification of only 3 dimensions is brane-antibrane annihilation. Simulations by Easther et al (2004) have shown that indeed the corresponding Einstein-Boltzmann equation tends to favor 3 large dimensions, but the other 6 still decompactify too fast. Based on an observation by Gibbons on branes on toric spaces, we attempt to balance the Einstein-Boltzmann equation by allowing branes to wrap a compact temporal dimension as well. We discuss cosmological implications of such a model of BGC.
References:
String Windings in the Early Universe, R.Easther, B.R.Greene, M.G.Jackson, Daniel Kabat, 2004
Wrapping Branes in Space and Time, G.W.Gibbons
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