Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2007-08-06
Phys.Rev.D77:023516,2008
Physics
High Energy Physics
High Energy Physics - Theory
20 pages, 1 figure, discussion extended and references added; minor mistake corrected
Scientific paper
10.1103/PhysRevD.77.023516
Braneworlds, understood here as double domain wall spacetimes, can be described in terms of a linear harmonic function, with kinks at the locations of the boundary branes. In a dynamical setting, there is therefore the risk that the boundary brane of negative tension, at whose location the value of the harmonic function is always lowest, can encounter a zero of this harmonic function, corresponding to the formation of a singularity. We show that for certain types of brane-bound matter this singularity can be avoided, and the negative-tension brane can shield the bulk spacetime from the singularity by bouncing back smoothly before reaching the singularity. In our analysis we compare the 5- and 4-dimensional descriptions of this phenomenon in order to determine the validity of the moduli space approximation.
Lehners Jean-Luc
Turok Neil
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