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Título: | Thouless energy challenges thermalization on the ergodic side of the many-body localization transition |
Autor: | Corps, Á.L. CSIC ORCID; Molina, Rafael A. CSIC ORCID; Relaño, Armando CSIC ORCID CVN | Fecha de publicación: | 1-jul-2020 | Editor: | American Physical Society | Citación: | Physical Review B 102: 014201 (2020) | Resumen: | 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. | Descripción: | 14 pags., 9 figs. | Versión del editor: | http://dx.doi.org/10.1103/PhysRevB.102.014201 | URI: | http://hdl.handle.net/10261/226508 | DOI: | 10.1103/PhysRevB.102.014201 | Identificadores: | doi: 10.1103/PhysRevB.102.014201 issn: 2469-9969 |
Aparece en las colecciones: | (CFMAC-IEM) Artículos |
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Thouless Energy.pdf | 2,25 MB | Adobe PDF | Visualizar/Abrir |
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