Cosmic String Lensing and Closed Time-like Curves

Details Cosmic String Lensing and Closed Time-like Curves Cosmic String Lensing and Closed Time-like Curves

2005-02-28

arxiv.org/abs/hep-th/0502242v2

Phys.Rev. D72 (2005) 043532

Physics

High Energy Physics

High Energy Physics - Theory

26 pages, 9 figures

Scientific paper

10.1103/PhysRevD.72.043532

In an analysis of the gravitational lensing by two relativistic cosmic strings, we argue that the formation of closed time-like curves proposed by Gott is unstable in the presence of particles (e.g. the cosmic microwave background radiation). Due to the attractor-like behavior of the closed time-like curve, we argue that this instability is very generic. A single graviton or photon in the vicinity, no matter how soft, is sufficient to bend the strings and prevent the formation of closed time-like curves. We also show that the gravitational lensing due to a moving cosmic string is enhanced by its motion, not suppressed.

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