Malard Sales, M.; Pires, A.S.T.; Dickman, Ronald; … - In: Physica A: Statistical Mechanics and its Applications 370 (2006) 2, pp. 601-612
We present a noise-driven model for obtaining the gap and line-width as functions of the temperature in the nonlinear sigma model. The method is phenomenological and rests on the following physical idea: a classical external stochastic field is introduced representing the coupling of the sigma...