Time-dependent orbifolds and string cosmology

• Tipo: Artigo em Revista Científica Internacional
• Data: 2004

Autores

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

Revista

Título: Fortschritte der Physik

Vol. 52

Páginas: 145-199

ISSN: 0015-8208

Editora: Wiley-Blackwell

Indexação

ISI Web of Knowledge - 125 Citações

Scopus - 128 Citações

Classificação Científica

FOS: Ciências exactas e naturais > Física

Outras Informações

ID Authenticus: P-000-BQP

DOI: 10.1002/prop.200310123

Abstract (EN): In these lectures, we review the physics of time-dependent orbifolds of string theory, with particular attention to orbifolds of three-dimensional Minkowski space. We discuss the propagation of free particles in the orbifold geometries, together with their interactions. We address the issue of stability of these string vacua and the difficulties in defining a consistent perturbation theory, pointing to possible solutions. In particular, it is shown that resumming part of the perturbative expansion gives finite amplitudes. Finally we discuss the duality of some orbifold models with the physics of orientifold planes, and we describe cosmological models based on the dynamics of these orientifolds. (C) 2004 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Idioma: Inglês

Tipo (Avaliação Docente): Científica