Frustrated expectations : defect networks and dark energy

• Tipo: Artigo em Revista Científica Internacional
• Data: 2006

Autores

P. P. Avelino (Autor) Outra; C.J.A.P. Martins (Autor) Outra; J. Menezes (Autor) Outra; R. Menezes (Autor) Outra; Joana Cassilda Rodrigues Espain de Oliveira (Autor) FEUP

Revista

Título: Physical Review D - Particles, Fields, Gravitation and Cosmology

Vol. 73 Nº 123519

Páginas: 1-9

ISSN: 1550-7998

Editora: American Physical Society

Indexação

ISI Web of Knowledge - 42 Citações

Scopus - 46 Citações

Classificação Científica

FOS: Ciências exactas e naturais > Física

CORDIS: Ciências Físicas > Astronomia > Cosmologia

Outras Informações

ID Authenticus: P-004-KKM

Abstract (EN): We discuss necessary conditions for a network of cosmic domain walls to have a chance of providing the dark energy that might explain the recent acceleration of the universe. We derive a strong bound on the curvature of the walls, which shows that viable candidate networks must be finetuned and non-standard. We also discuss various requirements that any stable lattice of frustrated walls must obey. We conjecture that, even though one can build (by hand) lattices that would be stable, no such lattices will ever come out of realistic domain wall forming cosmological phase transitions. We provide some simple numerical simulations that illustrate our results and correct some misconceptions in the published literature, but a detailed numerical analysis is left for a companion paper.

Idioma: Português

Tipo (Avaliação Docente): Científica