Instantons and lattice confinement
Veselov A. I. , Polikarpov M. I.
The freezing of the quantum fluctuations of the gauge fields in the lattice is analyzed. The region of the instanton-anti-instanton gas, the region of annihilation of the instantons and the region of the classical solutions are identified. The contribution of single-instanton and many-instanton configurations to the coefficient of tension of the string is 5%.