Casimir Forces via Worldline Numerics: Method Improvements and Potential   Engineering Applications
  The string theory inspired Worldline Numerics approach to Casimir force calculations has some favourable characteristics that might make it well suited for geometric optimization problems as they arise e.g. in NEMS device engineering. We explain this aspect in detail, developing some refinements of the method along the way. Also, we comment on the problem of generalizing Worldline Numerics from scalars to photons in the presence of conductors. 
Klaus Aehlig, Helge Dietert, Thomas Fischbacher, Jochen Gerhard
hep-th