Please use this identifier to cite or link to this item:
http://acervodigital.unesp.br/handle/11449/132335
- Title:
- Scalar field description of decaying-Lambda cosmologies
- Universidade Estadual Paulista (UNESP)
- Universidade de São Paulo (USP)
- Universidade Federal do Rio Grande do Norte (UFRN)
- 0556-2821
- 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.
- 15-Apr-2002
- Physical Review D - Particles, Fields, Gravitation and Cosmology, v. 65, n. 8 A, p. 835131-835137, 2002.
- 835131-835137
- American Physical Soc
- Algorithm
- Calculation
- Cosmos
- Energy
- Molecular dynamics
- Thermodynamics
- Time
- Vacuum
- http://dx.doi.org/10.1103/PhysRevD.65.083513
- Acesso restrito
- outro
- http://repositorio.unesp.br/handle/11449/132335
There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.