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29 March 2024
 
  » arxiv » hep-th/0302137

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On the Classical Stability of Orientifold Cosmologies
L. Cornalba ; M.S. Costa ;
Date 18 Feb 2003
Journal Class.Quant.Grav. 20 (2003) 3969-3996
Subject hep-th gr-qc
AbstractWe analyze the classical stability of string cosmologies driven by the dynamics of orientifold planes. These models are related to time-dependent orbifolds, and resolve the orbifold singularities which are otherwise problematic by introducing orientifold planes. In particular, we show that the instability discussed by Horowitz and Polchinski for pure orbifold models is resolved by the presence of the orientifolds. Moreover, we discuss the issue of stability of the cosmological Cauchy horizon, and we show that it is stable to small perturbations due to in-falling matter.
Source arXiv, hep-th/0302137
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