期刊
GENERAL RELATIVITY AND GRAVITATION
卷 42, 期 6, 页码 1513-1522出版社
SPRINGER/PLENUM PUBLISHERS
DOI: 10.1007/s10714-009-0923-6
关键词
Viscous cosmology; Big Rip singularity; Casimir effect in cosmology
资金
- ESF
- Scientific School LRSS [N.2553.2008.2]
- MICINN (Spain) [FIS2006-02842]
Analytical properties of the scalar expansion in the cosmic fluid are investigated, especially near the future singularity, when the fluid possesses a constant bulk viscosity zeta. In addition, we assume that there is a Casimir-induced term in the fluid's energy-momentum tensor, in such a way that the Casimir contributions to the energy density and pressure are both proportional to 1/a (4), a being the scale factor. A series expansion is worked out for the scalar expansion under the condition that the Casimir influence is small. Close to the Big Rip singularity the Casimir term has however to fade away and we obtain the same singular behavior for the scalar expansion, the scale factor, and the energy density, as in the Casimir-free viscous case.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据