How to Count Kinks: From the Continuum to the Lattice and Back

Details How to Count Kinks: From the Continuum to the Lattice and Back How to Count Kinks: From the Continuum to the Lattice and Back

1997-04-07

arxiv.org/abs/hep-lat/9704005v2

Phys.Lett. B422 (1998) 69-75

Physics

High Energy Physics

High Energy Physics - Lattice

7 pages, 5 PostScript figures, RevTeX. Revised version to appear in Physics Letters B. References and comparison with previous

Scientific paper

10.1016/S0370-2693(97)01595-5

We investigate the matching between (1+1)-dimensional nonlinear field theories coupled to an external stochastic environment and their lattice simulations. In particular, we focus on how to obtain numerical results which are lattice-spacing independent, and on how to extract the correct effective potential which emerges from the simulations. As an application, we study the thermal production of kink-antikink pairs, obtaining a number density of pairs which is lattice-spacing independent and the effective barrier for pair production, i.e., the effective kink mass.

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