Large N Limit on Langevin Equation: Two-Dimensional Nonlinear Sigma Model
Riuji Mochizuki, K. Yoshida · Progress of Theoretical Physics · 1993
We study the stochastic quantization of two-dimensional nonlinear sigma model in the large N limit. Our main tool is the effective Langevin equation with which we investigate nonperturbative phenomena and derive the results which are the same as what the path integral approach gives.