Spherically symmetric thick branes cosmological evolution

Autor(es)

Bernardini, A. E. ^[1] ; Cavalcanti, R. T. ^[2] ; da Rocha, Roldao ^[3]

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Carlos, Dept Fis, BR-13565905 Sao Carlos, SP - Brazil

^[2] Univ Fed ABC, Ctr Ciencias Nat & Humanas, BR-09210580 Santo Andre, SP - Brazil

^[3] Univ Fed ABC, Ctr Matemat Comp & Cognicao, BR-09210580 Santo Andre, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: GENERAL RELATIVITY AND GRAVITATION; v. 47, n. 1 JAN 2015.
• Citações Web of Science: 10

Resumo

Spherically symmetric time-dependent solutions for the 5D system of a scalar field canonically coupled to gravity are obtained and identified as an extension of recent results obtained by Ahmed et al. (JHEP 1404:061. arXiv:1312.3576 {[}hep-th], 2014). The corresponding cosmology of models with regularized branes generated by such a 5D scalar field scenario is also investigated. It has been shown that the anisotropic evolution of the warp factor and consequently the Hubble like parameter are both driven by the radial coordinate on the brane, which leads to an emergent thick brane-world scenario with spherically symmetric time dependent warp factor. Meanwhile, the separability of variables depending on fifth dimension, y, which is exhibited by the equations of motion, allows one to recover the extra dimensional profiles obtained in Ahmed et al. (2014), namely the extra dimensional part of the scale (warp) factor and the scalar field dependence on y. Therefore, our results are mainly concerned with the time dependence of a spherically symmetric warp factor. Besides evincing possibilities for obtaining asymmetric stable brane-world scenarios, the extra dimensional profiles here obtained can also be reduced to those ones investigated in Ahmed et al. (2014). (AU)

• Processo FAPESP: 08/50671-0 - Aplicações em mecânica quântica relativística e teoria de campos: oscilações quânticas, campos fermiônicos, quiralidade e equação de Dirac; sistemas com violação de Lorentz, energia escura e neutrinos cosmológicos; dinâmica relativística no efeito de tunelamento; zitterbewegung-like em sistemas fermiônicos em física da matéria condensada
• Beneficiário: Alex Eduardo de Bernardini
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores