Exact Solutions of Five Dimensional Anisotropic Cosmologies

Abstract

We solve the five dimensional vacuum Einstein equations for several kinds of anisotropic geometries. We consider metrics in which the spatial slices are characterized as Bianchi types-II and V, and the scale factors are dependent both on time and a non-compact fifth coordinate. We examine the behavior of the solutions we find, noting for which parameters they exhibit contraction over time of the fifth scale factor, leading naturally to dimensional reduction. We explore these within the context of the induced matter model: a Kaluza-Klein approach that associates the extra geometric terms due to the fifth coordinate with contributions to the four dimensional stress-energy tensor.

11 pages

References in corpus (3)

• Equivalence Between Space-Time-Matter and Brane-World Theories
• Universe Models with a Variable Cosmological "Constant" and a "Big Bounce"
• Cosmological Implications of a Non-Separable 5D Solution of the Vacuum Einstein Field Equations

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