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Título:
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Irreversible processes without energy dissipation in an isolated Lipkin-Meshkov-Glick model
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Autores:
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Puebla, Ricardo ;
Relaño Pérez, Armando
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Tipo de documento:
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texto impreso
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Editorial:
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American Physical Society, 2015-07-02
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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: Termodinámica
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Tipo = Artículo
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Resumen:
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For a certain class of isolated quantum systems, we report the existence of irreversible processes in which the energy is not dissipated. After a closed cycle in which the initial energy distribution is fully recovered, the expectation value of a symmetry-breaking observable changes from a value differing from zero in the initial state to zero in the final state. This entails the unavoidable loss of a certain amount of information and constitutes a source of irreversibility. We show that the von Neumann entropy of time-averaged equilibrium states increases in the same magnitude as a consequence of the process. We support this result by means of numerical calculations in an experimentally feasible system, the Lipkin-Meshkov-Glick model.
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En línea:
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https://eprints.ucm.es/id/eprint/32942/1/Rela%C3%B1o56%20libre.pdf
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