Semi-analytic techniques for calculating bubble wall profiles
  We present semi-analytic techniques for finding bubble wall profiles during
first order phase transitions with multiple scalar fields. Our method involves
reducing the problem to an equation with a single field, finding an analytic
solution and perturbing around it. The perturbations can be written in a
semi-analytic form. We argue that our technique lacks convergence problems and
demonstrate the speed of convergence on an example potential.
