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Dynamical decompactification from brane gases in eleven-dimensional supergravity

Antonio Campos

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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 account the full bosonic sector of eleven-dimensional supergravity. We find new cosmological solutions that can dynamically explain the existence of three large spatial dimensions characterized by a universal asymptotic scaling behaviour and a large number of initially unwrapped dimensions. This type of solutions enlarges the possible initial conditions of the Universe in the Hagedorn phase and consequently can potentially increase the probability of dynamical decompactification from anisotropically wrapped backgrounds.


Keywords

cosmology with extra dimensions

string theory and cosmology

physics of the early universe

PACS

04.65.+e Supergravity

04.50.-h Higher-dimensional gravity and other theories of gravity

11.25.Wx String and brane phenomenology

98.80.Cq Particle-theory and field-theory models of the early Universe (including cosmic pancakes, cosmic strings, chaotic phenomena, inflationary universe, etc.)

Subjects

Gravitation and cosmology

Particle physics and field theory

Astrophysics and astroparticles

Dates

Issue 01 (January 2005)

Received 25 November 2004, accepted for publication 18 December 2004

Published 20 January 2005



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