Renormalization group description of the nonequilibrium critical dynamics of spin systems at the fixed space dimension $d=3$

I. M. Lavrukhin   ; V. V. Prudnikov   ; P. V. Prudnikov

Teoretičeskaâ i matematičeskaâ fizika, Tome 190 (2017) no. 3, pp. 468-478

Résumé

We present the method and results of a renormalization group description of nonequilibrium critical relaxation of model A with evolution from an initial high-temperature state. We calculate the two-time dependence of the correlation function and response function and find a violation of the fluctuation-dissipation theorem in the nonequilibrium critical regime. For the limit fluctuation-dissipation relation, which is a universal property of the nonequilibrium critical dynamics, we calculate the fluctuation and impurity corrections in the two-loop approximation at the fixed space dimension $d=3$ using Padé–Borel summation for asymptotic series.

Détail

Keywords: nonequilibrium critical dynamics, renormalization group, fluctuation-dissipation relation, aging effect.

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