Nonequilibrium response of a disordered Ising chain |
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Authors: | S. Dattagupta R. Vaidyanathan R. Indira |
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Affiliation: | (1) School of Physics, University of Hyderabad, 500134 Hyderabad, India;(2) Fast Reactor Group, Reactor Research Centre, 603102 Kalpakkam, India;(3) Institut für Festkörperforschung der Kernforschungsanlage Jülich GmbH, D-5170 Jülich 1, FRG |
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Abstract: | The relaxation behaviour of a model disordered system is studied. The model considered is a nearest neighbour Ising chain in which the bond strengths are distributed at random between the discrete values +J and -J with equal probability. The system is prepared in a given state and is allowed to relax to a new state of equilibrium. This approach to equilibrium is probed by means of an applied, weak, time-dependent magnetic field. The relevant physical quantity is a nonequilibrium susceptibility which is calculated exactly. A comparison between this, and the corresponding quantity for the pure chain, reveals certain distinctive features of the time-dependent properties of disordered systems.Deceased |
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