Title: One-step replica-symmetry-breaking solution of the Sherrington–Kirkpatrick model under a Gaussian random field
Abstract:The Sherrington–Kirkpatrick model, in the presence of a Gaussian random field, is studied through the replica formalism within a one-step replica-symmetry-breaking procedure. This model treated in the...The Sherrington–Kirkpatrick model, in the presence of a Gaussian random field, is studied through the replica formalism within a one-step replica-symmetry-breaking procedure. This model treated in the replica-symmetry approximation does not exhibit a spin-glass phase, since the corresponding order parameter becomes trivially induced by the random field. However, such a phase appears naturally through the present approach, being associated with the onset of replica-symmetry breaking. It is shown that the low-temperature negative-entropy problem, characteristic of the replica-symmetry approximation, is practically resolved within this improved approach. Phase diagrams, the corresponding order parameters, and thermodynamic properties are computed; the present results are expected to be very close to the correct ones, i.e., those that could be obtained from the full replica-symmetry-breaking procedure.Read More
Publication Year: 2011
Publication Date: 2011-07-22
Language: en
Type: article
Indexed In: ['crossref']
Access and Citation
Cited By Count: 11
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