The Mpemba effect in spin glasses is a persistent memory effect.
Mpemba effect
memory effects
nonequilibrium physics
spin glasses
Journal
Proceedings of the National Academy of Sciences of the United States of America
ISSN: 1091-6490
Titre abrégé: Proc Natl Acad Sci U S A
Pays: United States
ID NLM: 7505876
Informations de publication
Date de publication:
30 Jul 2019
30 Jul 2019
Historique:
pubmed:
18
7
2019
medline:
18
7
2019
entrez:
18
7
2019
Statut:
ppublish
Résumé
The Mpemba effect occurs when a hot system cools faster than an initially colder one, when both are refrigerated in the same thermal reservoir. Using the custom-built supercomputer Janus II, we study the Mpemba effect in spin glasses and show that it is a nonequilibrium process, governed by the coherence length ξ of the system. The effect occurs when the bath temperature lies in the glassy phase, but it is not necessary for the thermal protocol to cross the critical temperature. In fact, the Mpemba effect follows from a strong relationship between the internal energy and ξ that turns out to be a sure-tell sign of being in the glassy phase. Thus, the Mpemba effect presents itself as an intriguing avenue for the experimental study of the coherence length in supercooled liquids and other glass formers.
Identifiants
pubmed: 31311870
pii: 1819803116
doi: 10.1073/pnas.1819803116
pmc: PMC6681724
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
15350-15355Références
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