Application of Ewald's Method for Efficient Summation of Dyon Long-Range   Potentials
  We study a model of dyons for SU(2) Yang-Mills theory at finite temperature T < T_c, in particular its ability to generate a confining force between a static quark antiquark pair. The interaction between dyons corresponds to a long-range 1/r potential, which in naive treatments with a finite number of dyons typically gives rise to severe finite volume effects. To avoid such effects we apply the so-called Ewald method, which has its origin in solid state physics. The basic idea of Ewald's method is to consider a finite number of dyons inside a finite cubic volume and enforce periodicity of this volume. We explain the technicalities of Ewald's method and outline how the method can be applied to a wider class of 1/r^p long-range potentials. 
Benjamin Maier, Falk Bruckmann, Simon Dinter, Ernst-Michael   Ilgenfritz, Michael Muller-Preussker, Marc Wagner
hep-ph