On a Lagrangean for classical field dynamics and renormalization group calculations of dynamical critical properties期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

On a Lagrangean for classical field dynamics and renormalization group calculations of dynamical critical properties

Authors:	Hans-Karl Janssen

Affiliation:	(1) Kernforschungsanlage Jülich, Institut für Festkörperforschung, Postfach 1913, D-5170 Jülich, Federal Republic of Germany

Abstract:	From the path probability density for nonlinear stochastic processes a Lagrangean for classical field dynamics is derived. This formulation provides a convenient approach to the mode coupling equations and the renormalization group theory of critical dynamics. An application is given for the time-dependent isotropic Heisenberg ferromagnet. The dynamical exponent $z = frac{{d + 2 - eta }}{2}$ is derived aboveT_c for all dimensionsd>2.

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