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 ζ 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 ζ 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.

The Mpemba effect in spin glasses is a persistent memory effect / Baity-Jesi, M.; Calore, E.; Cruz, A.; Fernandez, L. A.; Gil-Narvion, J. M.; Gordillo-Guerrero, A.; Iniguez, D.; Lasanta, A.; Maiorano, A.; Marinari, E.; Martin-Mayor, V.; Moreno-Gordo, J.; Sudupe, A. M.; Navarro, D.; Parisi, G.; Perez-Gaviro, S.; Ricci-Tersenghi, F.; Ruiz-Lorenzo, J. J.; Schifano, S. F.; Seoane, B.; Tarancon, A.; Tripiccione, R.; Yllanes, D.. - In: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA. - ISSN 0027-8424. - 116:31(2019), pp. 15350-15355. [10.1073/pnas.1819803116]

The Mpemba effect in spin glasses is a persistent memory effect

Marinari E.;Ricci-Tersenghi F.;
2019

Abstract

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 ζ 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 ζ 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.
2019
Memory effects; mpemba effect; nonequilibrium physics; spin glasses
01 Pubblicazione su rivista::01a Articolo in rivista
The Mpemba effect in spin glasses is a persistent memory effect / Baity-Jesi, M.; Calore, E.; Cruz, A.; Fernandez, L. A.; Gil-Narvion, J. M.; Gordillo-Guerrero, A.; Iniguez, D.; Lasanta, A.; Maiorano, A.; Marinari, E.; Martin-Mayor, V.; Moreno-Gordo, J.; Sudupe, A. M.; Navarro, D.; Parisi, G.; Perez-Gaviro, S.; Ricci-Tersenghi, F.; Ruiz-Lorenzo, J. J.; Schifano, S. F.; Seoane, B.; Tarancon, A.; Tripiccione, R.; Yllanes, D.. - In: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA. - ISSN 0027-8424. - 116:31(2019), pp. 15350-15355. [10.1073/pnas.1819803116]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1339772
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