Theδexpansion for stochastic quantization
Carl M. Bender, Fred Cooper, Kimball A. Milton · Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields · 1989
Using a recently proposed perturbation expansion called the \ensuremath{\delta} expansion, we show how to solve the Langevin equation associated with a g${\ensuremath{\varphi}}^{4}$ field theory. We illustrate the technique in zero- and one-dimensional space-time, and then generalize this approach to d dimensions.