Letter: Anisotropic Born-Infeld Cosmologies |
| |
Authors: | Dan N. Vollick |
| |
Affiliation: | (1) Department of Physics, Okanagan University College, Box 189, 2552 Trans Canada Hwy, Salmon Arm, BC, V1E 4N3, Canada |
| |
Abstract: | Anisotropic cosmological spacetimes are constructed from spherically symmetric solutions to Einstein's equations coupled to nonlinear electrodynamics and a positive cosmological constant. This is accomplished by finding solutions in which the roles of r and t are interchanged for all r > 0 (i.e. r becomes timelike and t becomes spacelike). Constant time hypersurfaces have topology R× S2 and in all the spacetimes considered the radius of the two sphere vanishes as t goes to zero. The scale factor of the other dimension diverges as t goes to zero in some solutions and vanishes (or goes to a constant) in other solutions. At late times local observers would see the universe to be homogeneous and isotropic. |
| |
Keywords: | Anisotropic cosmology Born-Infeld theory |
本文献已被 SpringerLink 等数据库收录! |
|