We present a method to calculate short-time nonequilibrium universal exponents within the functional-renormalization-group scheme. As an example, we consider the classical critical dynamics of the relaxational model A after a quench of the temperature of the system and calculate the initial-slip exponent which characterizes the nonequilibrium universal short-time behavior of both the order parameter and correlation functions. The value of this exponent is found to be consistent with the result of a perturbative dimensional expansion and of Monte Carlo simulations in three spatial dimensions. ©2016 American Physical Society.

Universal short-time dynamics: Boundary functional renormalization group for a temperature quench

Gambassi, Andrea;
2016-01-01

Abstract

We present a method to calculate short-time nonequilibrium universal exponents within the functional-renormalization-group scheme. As an example, we consider the classical critical dynamics of the relaxational model A after a quench of the temperature of the system and calculate the initial-slip exponent which characterizes the nonequilibrium universal short-time behavior of both the order parameter and correlation functions. The value of this exponent is found to be consistent with the result of a perturbative dimensional expansion and of Monte Carlo simulations in three spatial dimensions. ©2016 American Physical Society.
2016
94
17
1
18
174301
https://arxiv.org/abs/1606.06272
http://cdsads.u-strasbg.fr/abs/2016PhRvB..94q4301C
Chiocchetta, A.; Gambassi, Andrea; Diehl, S.; Marino, J.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11767/14881
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