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Título:
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Complex saddle points in the Gross-Witten-Wadia matrix model
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Autores:
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Álvarez Galindo, Gabriel ;
Martínez Alonso, Luis ;
Medina, Elena
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Tipo de documento:
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texto impreso
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Editorial:
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Amer Physical Soc, 2016-11-14
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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: Física-Modelos matemáticos
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Materia = Ciencias: Física: Física matemática
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Tipo = Artículo
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Resumen:
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We give an exhaustive characterization of the complex saddle point configurations of the Gross-WittenWadia matrix model in the large-N limit. In particular, we characterize the cases in which the saddles accumulate in one, two, or three arcs, in terms of the values of the coupling constant and of the fraction of the total unit density that is supported in one of the arcs, and derive an explicit condition for gap closing associated with nonvacuum saddles. By applying the idea of large-N instanton we also give direct analytic derivations of the weak- coupling and strong-coupling instanton actions.
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En línea:
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https://eprints.ucm.es/42262/1/alvarez14libre.pdf
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