A new approach to perturbative theory in the nonperturbative QCD vacuum
  Using stochastic quantization method we derive gauge-invariant equations, connecting multilocal vacuum correlators of nonperturbative field configurations immersed into the quantum background. Three alternative methods of stochastic regularization of these equations are suggested, and the corresponding regularized propagators of a background field are obtained in the lowest order of perturbation theory. 
D.V.Antonov (ITEP, Moscow)