Título:
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Thouless energy challenges thermalization on the ergodic side of the many-body localization transition
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Autores:
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Corps, Angel L. ;
Molina, Rafael A. ;
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, 2020-07-01
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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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We study the ergodic side of the many-body localization transition in its standard model, the disordered Heisenberg quantum spin chain. We show that the Thouless energy, extracted from long-range spectral statistics and the power-spectrum of the full momentum distribution fluctuations, is not large enough to guarantee thermalization. We find that both estimates coincide and behave nonmonotonically, exhibiting a strong peak at an intermediate value of the disorder. Furthermore, we show that nonthermalizing initial conditions occur well within the ergodic phase with larger probability than expected. Finally, we propose a mechanism, driven by the Thouless energy and the presence of anomalous events, for the transition to the localized phase.
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En línea:
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https://eprints.ucm.es/id/eprint/61660/1/Rela%C3%B1o65preprint.pdf
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