Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2005-09-14
JCAP 0510:017,2005
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
20 pages, 2 figures. Accepted by JCAP. Minor proofreading corrections; several references added
Scientific paper
10.1088/1475-7516/2005/10/017
The geodesics of a spacetime seldom coincide with those of an embedded submanifold of codimension one. We investigate this issue for higher-dimensional general relativity-like models, firstly in the simpler case without branes to isolate which features are already present, and then in the more complicated case with branes. The framework in which we consider branes is general enough to include asymmetric braneworlds but not thick branes. We apply our results on geodesics to study both the equivalence principle and cosmological singularities. Among the models we study these considerations favour $Z_2$ symmetric braneworlds with a negative bulk cosmological constant.
Anderson Edward
Tavakol Reza
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