Excitation morphology of short range Ising spin glasses

Paolo Sibani and Jan-Olov Andersson

Physica A: Statistical Mechanics and its Applications, 1994, vol. 206, issue 1, 1-12

Abstract: We numerically examine Ising spin-glass models, with lattice sizes up to 323 in 3D and 2562 in 2D. A good local minimum Ψ is initially found, and used as a reference state. The phase-space of the system in a neighborhood of Ψ is sampled by first generating an excited state with energy b measured from Ψ and by then quenching the system to a new local energy minimum Ψ'. Connected clusters of spins which differ in the two configurations are identified. The dependence of their number, size and energy on b is shown to be systematic. It can be described in terms of simple functions for sufficiently low b. We find in addition a transition to a high b regime, where the behavior of the above quantities is qualitatively different. The dynamical consequences of our results, in particular the thermal metastability properties, are discussed in some detail.

Date: 1994
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:206:y:1994:i:1:p:1-12

DOI: 10.1016/0378-4371(94)90115-5

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