Collisions in piecewise flat gravity in 3+1 dimensions

Details Collisions in piecewise flat gravity in 3+1 dimensions Collisions in piecewise flat gravity in 3+1 dimensions

2010-02-19

arxiv.org/abs/1002.3708v1

Class. Quantum Grav. 27 (2010) 145003

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

29 pages, 12 figures

Scientific paper

10.1088/0264-9381/27/14/145003

We consider the (3+1)-dimensional locally finite gravity model proposed by 't Hooft. In particular we revisit the problem of resolving collisions of string defects. We provide a new geometric description of the configurations of strings using piecewise flat manifolds, and use it to resolve a more general class of collisions. We argue that beyond certain bounds for the deficiency/surplus angles no resolutions may be found that satisfy the imposed causality conditions.

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