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We investigate the critical dynamics of the time-dependent Landau-Ginzburgmodel with non conserved n-component order parameter (Model A) in the presenceof long-range correlated quenched impurities. We use a special kind oflong-range correlations, previously introduced by Weinrib and Halperin. Using adouble expansion in \epsilon and \delta we calculate the critical exponent z upto second order on the small parameters. We show that the quenched impuritiesof this kind affect the critical dynamics already in first order of \epsilonand \delta, leading to a relevant correction for the mean field value of theexponent zComment: 7 pages, REVTEX, to be published in Phys. Rev.

Dynamical properties of the Landau-Ginzburg model with long-range correlated quenched impurities