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Título:
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The three-dimensional Ising spin glass in an external magnetic field: the role of the silent majority
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Autores:
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Baity Jesi, Marco ;
Fernández Pérez, Luis Antonio ;
Martín Mayor, Víctor ;
Muñoz Sudupe, Antonio ;
otros, ...
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Tipo de documento:
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texto impreso
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Editorial:
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IOP Publishing, 2014-05-16
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Dimensiones:
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application/pdf
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Nota general:
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info:eu-repo/semantics/openAccess
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Idiomas:
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Palabras clave:
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Estado = Publicado
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Materia = Ciencias: Física
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Materia = Ciencias: Física: Física-Modelos matemáticos
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Tipo = Artículo
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Resumen:
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We perform equilibrium parallel-tempering simulations of the 3D Ising Edwards-Anderson spin glass in a field, using the Janus computer. A traditional analysis shows no signs of a phase transition. Yet, we encounter dramatic fluctuations in the behaviour of the model: Averages over all the data only describe the behaviour of a small fraction of it. Therefore we develop a new approach to study the equilibrium behaviour of the system, by classifying the measurements as a function of a conditioning variate. We propose a finite-size scaling analysis based on the probability distribution function of the conditioning variate, which may accelerate the convergence to the thermodynamic limit. In this way, we find a non-trivial spectrum of behaviours, where a part of the measurements behaves as the average, while the majority of them shows signs of scale invariance. As a result, we can estimate the temperature interval where the phase transition in a field ought to lie, if it exists. Although this would be critical regime is unreachable with present resources, the numerical challenge is finally well posed.
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En línea:
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https://eprints.ucm.es/id/eprint/36341/1/Fern%C3%A1ndezP%C3%A9rezLuisAntonio71LIBRE%20PREPRINT.pdf
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