Creating Naked Singularities and Negative Energy

Details Creating Naked Singularities and Negative Energy Creating Naked Singularities and Negative Energy

2003-12-11

arxiv.org/abs/hep-th/0312123v1

Phys.Scripta T117 (2005) 86-91

Physics

High Energy Physics

High Energy Physics - Theory

16 pages, to appear in the proceedings of the Nobel Symposium on Cosmology and String Theory, Aug. 2003

Scientific paper

A brief review is given of three recent results concerning classical solutions of gravitational theories: (1) With asymptotically anti de Sitter boundary conditions, there are matter theories satisfying the positive energy theorem which violate cosmic censorship. (2) Despite supersymmetry, there are solutions to N=8 supergravity in which the total gravitational energy is arbitrarily negative. This theory can also violate cosmic censorship. (3) A large class of supersymmetric compactifications (including all simply connected Calabi-Yau manifolds) have solutions with negative four dimensional effective energy density.

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