تقرير
The Mpemba effect in spin glasses is a persistent memory effect
| العنوان: | The Mpemba effect in spin glasses is a persistent memory effect |
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| المؤلفون: | Janus collaboration, Baity-Jesi, M., Calore, E., Cruz, A., Fernandez, L. A., Gil-Narvion, J. M., Gordillo-Guerrero, A., Iñiguez, D., Lasanta, A., Maiorano, A., Marinari, E., Martin-Mayor, V., Moreno-Gordo, J., Muñoz-Sudupe, A., 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. |
| المصدر: | PNAS 116 (2019), 15350-15355 |
| سنة النشر: | 2018 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Disordered Systems and Neural Networks |
| الوصف: | 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 non-equilibrium process, governed by the coherence length \xi 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 \xi that turns out to be a sure-tell sign of being in the glassy phase. Thus, the Mpemba effect presents itself as an intriguing new avenue for the experimental study of the coherence length in supercooled liquids and other glass formers. Comment: Version accepted for publication in PNAS. 6 pages, 7 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1073/pnas.1819803116 |
| الوصول الحر: | http://arxiv.org/abs/1804.07569Test |
| رقم الانضمام: | edsarx.1804.07569 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1073/pnas.1819803116 |
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