Cosmic String Lensing and Closed Time-like Curves

Abstract

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.

26 pages, 9 figures

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Cited by in corpus (12)

• Large parallel cosmic string simulations: New results on loop production
• Reconnection of Non-Abelian Cosmic Strings
• Effect of the cosmological constant on the deflection angle by a rotating cosmic string
• Cosmic Superstring Gravitational Lensing Phenomena: Predictions for Networks of (p,q) Strings
• Causality-Violating Higgs Singlets at the LHC
• Direct Observation of Cosmic Strings via their Strong Gravitational Lensing Effect: I. Predictions for High Resolution Imaging Surveys
• Cosmic String Loops and Gravitational Radiation
• Probing Cosmic Strings with Gravitational-Wave Fringe
• Characterizing a cosmic string with the statistics of string lensing
• Prospects of Cosmic Superstring Detection through Microlensing of Extragalactic Point-Like Sources
• PhD Thesis: String theory in the early universe
• Physical and Stable Closed Timelike Curves