We show that the confining phase of the SU(2) lattice gauge theory the condensate of abelian magnetic monopoles exists. This condensate vanishes at the critical temperature or (on a symmetric lattice) at the cooling step where the string tension vanishes. These results seem to confirm the confinement mechanism based on the model of the dual superconductor. As a justification of our definition of the monopole condensate we study the U(1) lattice gauge theory.
L. et al. (Mon,) studied this question.