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2019 | OriginalPaper | Buchkapitel

The Free Energy of the GREM with Random Magnetic Field

verfasst von : Louis-Pierre Arguin, Roberto Persechino

Erschienen in: Statistical Mechanics of Classical and Disordered Systems

Verlag: Springer International Publishing

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Abstract

We study the extreme value statistics of the two-level Generalized Random Energy Model (GREM) coupled with a random magnetic field. This model generalizes both the Random Energy Model (REM) combined with a random magnetic field studied by de Oliveira Filho et al. and Arguin and Kistler, and that of the GREM in the presence of a uniform external field studied by Bovier and Klimovsky. The extreme value statistics of the model are determined at the level of the entropy and of the free energy, generalizing the behavior found in Arguin and Kistler and Bovier and Klimovsky. The proofs rely on an application of large deviation theory which reduces the problem to that of a GREM on a subset of configurations for which the magnetization attains a specific value. The methods introduced are general and extend to the k-level GREM in the presence of a random magnetic field.

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Metadaten
Titel
The Free Energy of the GREM with Random Magnetic Field
verfasst von
Louis-Pierre Arguin
Roberto Persechino
Copyright-Jahr
2019
DOI
https://doi.org/10.1007/978-3-030-29077-1_3