Supertube domain-walls and elimination of closed time-like curves in string theory

Details Supertube domain-walls and elimination of closed time-like curves in string theory Supertube domain-walls and elimination of closed time-like curves in string theory

2004-04-29

arxiv.org/abs/hep-th/0404239v4

Phys.Rev. D70 (2004) 084031

Physics

High Energy Physics

High Energy Physics - Theory

22 pages, JHEP3 class. V2: Some corrections and clariffications, references added. V3: more corrections to formulas, results u

Scientific paper

10.1103/PhysRevD.70.084031

We show that some novel physics of supertubes removes closed time-like curves from many supersymmetric spaces which naively suffer from this problem. The main claim is that supertubes naturally form domain-walls, so while analytical continuation of the metric would lead to closed time-like curves, across the domain-wall the metric is non-differentiable, and the closed time-like curves are eliminated. In the examples we study the metric inside the domain-wall is always of the G\"odel type, while outside the shell it looks like a localized rotating object, often a rotating black hole. Thus this mechanism prevents the appearance of closed time-like curves behind the horizons of certain rotating black holes.

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