Lattice study of the Kink soliton and the zero-mode problem for phi4 in   two dimensions
  We study the $\lambda\phi^4_{1+1}$ kink solion and the zero-mode contribution to the Kink soliton mass in regions beyond the semiclassical regime. The calculations are done in the non-trivial scaling region and where appropriate the results are compared with the continuum, semiclassical values. We show, as a function of parameter space, where the zero-mode contributions become significant. 
A. Ardekani and A. G. Williams