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This article is cited in 12 scientific papers (total in 12 papers)
METHODS OF THEORETICAL PHYSICS
Calculation of the fluctuation-dissipation ratio for the nonequilibrium critical behavior of disordered systems
P. V. Prudnikov, V. V. Prudnikov, E. A. Pospelov Omsk State University
Abstract:
The values of a new universal parameter characterizing a nonequilibrium critical behavior, namely, the fluctuation-dissipation ratio specifying a fundamental relation between the dynamic response function and the correlation function, are calculated for the disordered three-dimensional Ising model. The analysis of the two-time dependence for autocorrelation functions and the ac susceptibility for the systems with spin densities $p = 1.0$, $0.8$, and $0.6$ shows the aging effects characterized by the anomalous slowing of relaxation in the system with the growth of the waiting time and the violation of the fluctuation-dissipation theorem. To improve the accuracy of the ac susceptibility calculations, the “thermal bath” technique has been used without introducing the applied magnetic field in the simulation. It has been shown that the structural defects lead to the pronounced enhancement of the aging effects.
Received: 26.07.2013 Revised: 14.10.2013
Citation:
P. V. Prudnikov, V. V. Prudnikov, E. A. Pospelov, “Calculation of the fluctuation-dissipation ratio for the nonequilibrium critical behavior of disordered systems”, Pis'ma v Zh. Èksper. Teoret. Fiz., 98:10 (2013), 693–699; JETP Letters, 98:10 (2013), 619–625
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https://www.mathnet.ru/eng/jetpl3578 https://www.mathnet.ru/eng/jetpl/v98/i10/p693
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Abstract page: | 271 | Full-text PDF : | 77 | References: | 38 | First page: | 8 |
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