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Brane world cosmology without the Z_2 symmetry.

Davis, A-C. and Vernon, I. and Davis, S. C. and Perkins, W. B. (2001) 'Brane world cosmology without the Z_2 symmetry.', Physics letters B., 504 (3). pp. 254-261.


The Friedmann equation for a positive tension brane situated between two bulk spacetimes that posses the same 5D cosmological constant, but which does not posses a Z2 symmetry of the metric itself is derived, and the possible effects of dropping the Z2 symmetry on the expansion of our Universe are examined; cosmological constraints are discussed. We show the effect of this is an inflation-like period at very early times. The global solutions for the metric in the infinite extra dimension case are found and comparison with the symmetric case is made. We show that any brane world senario of this type must revert to a Z2 symmetric form at late times, and hence rule out certain proposed scenarios.

Item Type:Article
Keywords:Extra-dimensions, Cosmology.
Full text:(AM) Accepted Manuscript
Available under License - Creative Commons Attribution Non-commercial No Derivatives.
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Publisher statement:© 2001 This manuscript version is made available under the CC-BY-NC-ND 4.0 license
Date accepted:19 February 2001
Date deposited:12 October 2017
Date of first online publication:28 March 2001
Date first made open access:No date available

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