Singularities and closed time-like curves in type IIB 1/2 BPS geometries

Details Singularities and closed time-like curves in type IIB 1/2 BPS geometries Singularities and closed time-like curves in type IIB 1/2 BPS geometries

2005-07-06

arxiv.org/abs/hep-th/0507056v2

JHEP 0509:008,2005

Physics

High Energy Physics

High Energy Physics - Theory

34 pages, 7 figures, LaTeX. References added

Scientific paper

10.1088/1126-6708/2005/09/008

We study in detail the moduli space of solutions discovered in LLM relaxing the constraint that guarantees the absence of singularities. The solutions fall into three classes, non-singular, null-singular and time machines with a time-like naked singularity. We study the general features of these metrics and prove that there are actually just two generic classes of space-times - those with null singularities are in the same class as the non-singular metrics. AdS/CFT seems to provide a dual description only for the first of these two types of space-time in terms of a unitary CFT indicating the possible existence of a chronology protection mechanism for this class of geometries.

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