On the classical stability of orientifold cosmologies

• Tipo: Artigo em Revista Científica Internacional
• Data: 2003

Autores

Cornalba, L (Autor) Outra; Costa, MS (Autor) FCUP

Revista

Título: Classical and Quantum Gravity

Vol. 20

Páginas: 3969-3995

ISSN: 0264-9381

Editora: Institute of Physics Publishing

Indexação

ISI Web of Knowledge - 29 Citações

Scopus - 30 Citações

Classificação Científica

FOS: Ciências exactas e naturais > Física

Outras Informações

ID Authenticus: P-000-F4N

DOI: 10.1088/0264-9381/20/18/309

Abstract (EN): We analyse 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.

Idioma: Inglês

Tipo (Avaliação Docente): Científica