Entropy of spatial monopole currents in pure SU(2) QCD at finite   temperature
  We study properties of space-like monopole trajectories in the Maximal Abelian gauge of quenched SU(2) QCD at the finite temperature. We concentrate on infrared monopole clusters which are responsible for the confinement properties of the theory. We determine numerically the effective action of the monopoles projected onto the three-dimensional time-slice. Then we derive the length distributions of the monopole loops and fix their entropy. 
M.N. Chernodub, Katsuya Ishiguro, Tsuneo Suzuki