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arXiv · 0708.0743

Bouncing Negative-Tension Branes

Jean-Luc Lehners·Neil Turok
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Abstract

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.

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Jean-Luc Lehners, Neil Turok. 2008-09-05. Bouncing Negative-Tension Branes. https://doi.org/10.1103/physrevd.77.023516

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