Particle Creation If a Cosmic String Snaps

Abstract

We calculate the Bogolubov coefficients for a metric which describes the snapping of a cosmic string. If we insist on a matching condition for all times {\it and} a particle interpretation, we find no particle creation.

10 pages, MRC.PH.17/94

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• The collision and snapping of cosmic strings generating spherical impulsive gravitational waves
• Refraction of geodesics by impulsive spherical gravitational waves in constant-curvature spacetimes with a cosmological constant
• Vacuum fluctuations for spherical gravitational impulsive waves
• Schwarzschild Atmospheric Processes: A Classical Path to the Quantum