Indication of critical scaling in time during the relaxation of an open quantum system.
Journal
Nature communications
ISSN: 2041-1723
Titre abrégé: Nat Commun
Pays: England
ID NLM: 101528555
Informations de publication
Date de publication:
24 Feb 2024
24 Feb 2024
Historique:
received:
28
10
2023
accepted:
08
02
2024
medline:
25
2
2024
pubmed:
25
2
2024
entrez:
24
2
2024
Statut:
epublish
Résumé
Near continuous phase transitions, universal power-law scaling, characterized by critical exponents, emerges. This behavior reflects the singular responses of physical systems to continuous control parameters like temperature or external fields. Universal scaling extends to non-equilibrium dynamics in isolated quantum systems after a quench, where time takes the role of the control parameter. Our research unveils critical scaling in time also during the relaxation dynamics of an open quantum system. Here we experimentally realize such a system by the spin of individual Cesium atoms dissipatively coupled through spin-exchange processes to a bath of ultracold Rubidium atoms. Through a finite-size scaling analysis of the entropy dynamics via numerical simulations, we identify a critical point in time in the thermodynamic limit. This critical point is accompanied by the divergence of a characteristic length, which is described by critical exponents that turn out to be unaffected by system specifics.
Identifiants
pubmed: 38402235
doi: 10.1038/s41467-024-46054-9
pii: 10.1038/s41467-024-46054-9
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
1714Subventions
Organisme : Deutsche Forschungsgemeinschaft (German Research Foundation)
ID : 277625399
Organisme : Deutsche Forschungsgemeinschaft (German Research Foundation)
ID : 163436311
Informations de copyright
© 2024. The Author(s).
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