Observing non-ergodicity due to kinetic constraints in tilted Fermi-Hubbard chains.
Journal
Nature communications
ISSN: 2041-1723
Titre abrégé: Nat Commun
Pays: England
ID NLM: 101528555
Informations de publication
Date de publication:
23 Jul 2021
23 Jul 2021
Historique:
received:
20
03
2021
accepted:
26
05
2021
entrez:
24
7
2021
pubmed:
25
7
2021
medline:
25
7
2021
Statut:
epublish
Résumé
The thermalization of isolated quantum many-body systems is deeply related to fundamental questions of quantum information theory. While integrable or many-body localized systems display non-ergodic behavior due to extensively many conserved quantities, recent theoretical studies have identified a rich variety of more exotic phenomena in between these two extreme limits. The tilted one-dimensional Fermi-Hubbard model, which is readily accessible in experiments with ultracold atoms, emerged as an intriguing playground to study non-ergodic behavior in a clean disorder-free system. While non-ergodic behavior was established theoretically in certain limiting cases, there is no complete understanding of the complex thermalization properties of this model. In this work, we experimentally study the relaxation of an initial charge-density wave and find a remarkably long-lived initial-state memory over a wide range of parameters. Our observations are well reproduced by numerical simulations of a clean system. Using analytical calculations we further provide a detailed microscopic understanding of this behavior, which can be attributed to emergent kinetic constraints.
Identifiants
pubmed: 34301932
doi: 10.1038/s41467-021-24726-0
pii: 10.1038/s41467-021-24726-0
pmc: PMC8302618
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
4490Subventions
Organisme : Deutsche Forschungsgemeinschaft (German Research Foundation)
ID : EXC-2111 - 39081486
Informations de copyright
© 2021. The Author(s).
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