Magnetic Monopoles and the Dual London Equation in SU(3) Lattice Gauge   Theory
  We propose a method for the determination of magnetic monopole currents in non-Abelian gauge theories which does not need a projection to Abelian degrees of freedom. With this definition we are able to determine the distribution of magnetic currents and electric fields for the gluonic flux tube between a pair of static charges. Further we check the validity of the Gauss law and the dual London equation in a gauge invariant formulation. 
Peter Skala, Manfried Faber, Martin Zach