Quantized fields and gravitational particle creation in f (R) expanding universes

Autor(es)

Pereira, S. H. ^[1] ; Bessa, C. H. G. ^[2] ; Lima, J. A. S. ^{[2, 3]}

Afiliação do(s) autor(es)

^[1] Univ Fed Itajuba, BR-35900373 Itabira, MG - Brazil

^[2] Univ Sao Paulo, Dept Astron IAGUSP, BR-05508900 Sao Paulo - Brazil

^[3] Ohio State Univ, Ctr Cosmol & Astroparticle Phys, Columbus, OH 43210 - USA

• Tipo de documento: Artigo Científico
• Fonte: Physics Letters B; v. 690, n. 2, p. 103-107, JUN 14 2010.
• Citações Web of Science: 27

Resumo

The problem of cosmological particle creation for a spatially flat, homogeneous and isotropic universes is discussed in the context of f (R) theories of gravity. Different from cosmological models based on general relativity theory, it is found that a conformal invariant metric does not forbid the creation of massless particles during the early stages (radiation era) of the universe. (C) 2010 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 04/13668-0 - Cosmologia na era da precisão: energia escura, matéria escura e radiação cósmica de fundo
• Beneficiário: Jose Ademir Sales de Lima
• Modalidade de apoio: Auxílio à Pesquisa - Temático