Singularities and Closed String Tachyons

Details Singularities and Closed String Tachyons Singularities and Closed String Tachyons

2006-02-22

arxiv.org/abs/hep-th/0602230v1

Physics

High Energy Physics

High Energy Physics - Theory

8 pages latex, based on comments at Solvay meeting

Scientific paper

A basic problem in gravitational physics is the resolution of spacetime singularities where general relativity breaks down. The simplest such singularities are conical singularities arising from orbifold identifications of flat space, and the most challenging are spacelike singularities inside black holes (and in cosmology). Topology changing processes also require evolution through classically singular spacetimes. I briefly review how a phase of closed string tachyon condensate replaces, and helps to resolve, basic singularities of each of these types. Finally I discuss some interesting features of singularities arising in the small volume limit of compact negatively curved spaces and the emerging zoology of spacelike singularities.

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