Stability of Horava-Witten Spacetimes

Details Stability of Horava-Witten Spacetimes Stability of Horava-Witten Spacetimes

2005-01-26

arxiv.org/abs/hep-th/0501212v2

Class.Quant.Grav.22:2589-2606,2005

Physics

High Energy Physics

High Energy Physics - Theory

21 pages, plain Latex. Updated references and improved discussion of energy conservation in section 3

Scientific paper

10.1088/0264-9381/22/13/005

Horava-Witten spacetimes necessarily include two branes of opposite tension. If these branes are BPS we are led to a puzzle: a negative tension brane should be unstable as it can loose energy by expanding, whereas a BPS brane should be stable as it resides at a minimum of the energy. We provide a detailed analysis of the energy of such braneworld spacetimes in 5 dimensions. This allows us to show by a non-perturbative positive energy theorem that Horava-Witten spacetimes are stable, essentially because the dynamics of the branes is entirely accounted for by the behaviour of the bulk fields. We also perform an ADM perturbative Hamiltonian analysis at quadratic order in order to illustrate the stability properties more explicitly.

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