Cosmological tensor perturbations in brane world models |
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Authors: | Andrew Mennim Richard A Battye Carsten van de Bruck |
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Institution: | (1) DAMTP, Centre for Mathematical Sciences, University of CambridgeWilberforce Road, Cambridge, CB3 0WA, United Kingdom;(2) Jodrell Bank Observatory, Department of Physics and Astronomy, University of Manchester, Macclesfield, Cheshire, SK11 9DL, United Kingdom |
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Abstract: | We discuss the problems faced in trying to deduce the evolution of cosmological perturbations in brane-world models. There
are two natural ways to formulate the problem: one which makes the equations of motion simple and the other which makes the
boundary condition simple. Unfortunately the problem is difficult to solve, even numerically, in either formalism. We present
a more phenomenological approach which, while it does not solve the problem for any given model, illustrates some generic
features one might expect to see in the tensor part of the cosmic microwave background power spectrum. We find that the observed
scale invariance of the cosmic microwave background provides bounds on brane world models.
This revised version was published online in July 2006 with corrections to the Cover Date. |
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