String Radiative Backreaction

Details String Radiative Backreaction String Radiative Backreaction

1994-08-22

arxiv.org/abs/astro-ph/9408078v1

Phys.Rev.Lett. 75 (1995) 4354-4357

Astronomy and Astrophysics

Astrophysics

9 Pages. Figures not included - Hard Copy available on request

Scientific paper

10.1103/PhysRevLett.75.4354

We discuss radiative backreaction for global strings described by the Kalb-Ramond action with an analogous derivation to that for the point electron in classical electrodynamics. We show how local corrections to the equations of motion allow one to separate the self-field of the string from that of the radiation-field. Modifications to this 'local backreaction approximation' circumvent the runaway solutions familiar from electrodynamics, allowing these corrections to be used to evolve string trajectories numerically. Comparisons are made with analytic and numerical radiation calculations from previous work and the merits and limitations of this approach are discussed. Finally, we comment on the relevance of this work to simulations of a cosmological network of global or axion strings. These methods can also be applied to describe graviational, electromagnetic and other forms of string radiative backreaction.

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