Lectures on the mass of topological solitons
  In this series of lectures a method is developed to compute one-loop shifts to classical masses of kinks, multi-component kinks, and self-dual vortices. Canonical quantization is used to show that the mass shift induced by one-loop quantum fluctuations is the trace of the square root of the differential operator governing these fluctuations. Standard mathematical techniques are used to deal with some powers of pseudo-differential operators. Ultraviolet divergences are tamed by using generalized zeta function regularization methods and, then performing zero-point energy and mass renormalizations. 
A. Alonso Izquierdo, W. Garcia Fuertes, M. A. Gonzalez Leon, M. de la   Torre Mayado, J. Mateos Guilarte, J. M. Munoz Castaneda