Publicação:
Scalar field description of decaying-Lambda cosmologies

Nenhuma Miniatura disponível

Data

2002-04-15

Orientador

Coorientador

Pós-graduação

Curso de graduação

Título da Revista

ISSN da Revista

Título de Volume

Editor

American Physical Soc

Tipo

Artigo

Direito de acesso

Acesso restrito

Resumo

The conditions under which cosmologies driven by time-varying cosmological terms can be described by a scalar field coupled to a perfect fluid are discussed. An algorithm to reconstruct potentials dynamically and thermodynamically analogous to given phenomenological λ models is presented. As a working example, the deflationary cosmology which evolves from a pure de Sitter vacuum state to a slightly modified Friedmann-Robertson-Walker cosmology is considered. It is found that this is an example of nonsingular warm inflation with an asymptotic exponential potential. Differences with respect to other scalar field descriptions of decaying vacuum cosmologies are addressed and possible extensions are indicated.

Descrição

Idioma

Inglês

Como citar

Physical Review D - Particles, Fields, Gravitation and Cosmology, v. 65, n. 8 A, p. 835131-835137, 2002.

Itens relacionados

Financiadores

Unidades

Departamentos

Cursos de graduação

Programas de pós-graduação