Philippe Brax et al 2004 Rep. Prog. Phys. 67 2183 doi:10.1088/0034-4885/67/12/R02
Philippe Brax1, Carsten van de Bruck2 and Anne-Christine Davis3
Show affiliationsRecent developments in the physics of extra dimensions have opened up new avenues to test such theories. We review cosmological aspects of brane world scenarios such as the Randall–Sundrum brane model and two-brane systems with a bulk scalar field. We start with the simplest brane world scenario leading to a consistent cosmology: a brane embedded in an anti-de Sitter space–time. We generalize this setting to the case with a bulk scalar field and then to two-brane systems.
We discuss different ways of obtaining a low-energy effective theory for two-brane systems, such as the moduli space approximation and the low-energy expansion. A comparison between the different methods is given. Cosmological perturbations are briefly discussed as well as early universe scenarios such as the cyclic model and the born-again brane world model. Finally we also present some physical consequences of brane world scenarios on the cosmic microwave background and the variation of constants.
Issue 12 (December 2004)
Received 2 April 2004
Published 2 November 2004
Philippe Brax et al 2004 Rep. Prog. Phys. 67 2183
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