Abelian Monopoles in SU(2) Lattice Gauge Theory as Physical Objects

Abstract

By numerical calculations we show that the abelian monopole currents are locally correlated with the density of SU(2) lattice action. The correlations are larger by the order of magnitude in the maximal abelian projection than in the projections which correspond to the diagonalization of Polyakov line and to the diagonalization of the plaquette. These facts show that (at least) in the maximal abelian projection the monopoles are the physical objects, they carry the SU(2) action. The larger value of \beta, the larger the relative action carried by monopole. Calculations on the asymmetric lattice show that this correlation exists also in the deconfinement phase of gluodynamics.

Comments: 6 pages, RevTeX, 3 figures, uses epsf.sty; to be published in Phys.Rev.Lett., replaced to match version accepted for publication