Soliton Dynamics in a Novel Discrete O(3) Sigma Model in (2+1) Dimensions

Details Soliton Dynamics in a Novel Discrete O(3) Sigma Model in (2+1) Dimensions Soliton Dynamics in a Novel Discrete O(3) Sigma Model in (2+1) Dimensions

1997-05-23

arxiv.org/abs/hep-th/9705184v1

Nonlinearity 10 (1997) 1357-1367

Physics

High Energy Physics

High Energy Physics - Theory

12 pages + 4 figures, LaTex, to appear in Nonlinearity

Scientific paper

10.1088/0951-7715/10/5/019

The O(3) sigma model in two spatial dimensions admits topological (Bogomol'nyi) lower bound on its energy. This paper proposes a lattice version of this system which maintains the Bogomol'nyi bound and allows the explicit construction of static solitons on the lattice. Numerical simulations show that these lattice solitons are unstable undersmall perturbations; in fact, their size changes linearly with time.

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