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Unifying fluctuation-dissipation temperatures of slow-evolving nonequilibrium systems from the perspective of inherent structures

For nonequilibrium systems, how to define temperature is one of the key and difficult issues to solve. Although effective temperatures have been proposed and studied to this end, it still remains elusive what they actually are. Here, we focus on the fluctuation-dissipation temperatures and report th...

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Autores principales: Zhang, Jianhua, Zheng, Wen, Zhang, Shiyun, Xu, Ding, Nie, Yunhuan, Jiang, Zhehua, Xu, Ning
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Association for the Advancement of Science 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8318365/
https://www.ncbi.nlm.nih.gov/pubmed/34321210
http://dx.doi.org/10.1126/sciadv.abg6766
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author Zhang, Jianhua
Zheng, Wen
Zhang, Shiyun
Xu, Ding
Nie, Yunhuan
Jiang, Zhehua
Xu, Ning
author_facet Zhang, Jianhua
Zheng, Wen
Zhang, Shiyun
Xu, Ding
Nie, Yunhuan
Jiang, Zhehua
Xu, Ning
author_sort Zhang, Jianhua
collection PubMed
description For nonequilibrium systems, how to define temperature is one of the key and difficult issues to solve. Although effective temperatures have been proposed and studied to this end, it still remains elusive what they actually are. Here, we focus on the fluctuation-dissipation temperatures and report that such effective temperatures of slow-evolving systems represent characteristic temperatures of their equilibrium counterparts. By calculating the fluctuation-dissipation relation of inherent structures, we obtain a temperature-like quantity T(IS). For monocomponent crystal-formers, T(IS) agrees well with the crystallization temperature T(c), while it matches with the onset temperature T(on) for glass-formers. It also agrees with effective temperatures of typical nonequilibrium systems, such as aging glasses, quasi-static shear flows, and quasi-static self-propelled flows. From the unique perspective of inherent structures, our study reveals the nature of effective temperatures and the underlying connections between nonequilibrium and equilibrium systems and confirms the equivalence between T(on) and T(c).
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spelling pubmed-83183652021-08-10 Unifying fluctuation-dissipation temperatures of slow-evolving nonequilibrium systems from the perspective of inherent structures Zhang, Jianhua Zheng, Wen Zhang, Shiyun Xu, Ding Nie, Yunhuan Jiang, Zhehua Xu, Ning Sci Adv Research Articles For nonequilibrium systems, how to define temperature is one of the key and difficult issues to solve. Although effective temperatures have been proposed and studied to this end, it still remains elusive what they actually are. Here, we focus on the fluctuation-dissipation temperatures and report that such effective temperatures of slow-evolving systems represent characteristic temperatures of their equilibrium counterparts. By calculating the fluctuation-dissipation relation of inherent structures, we obtain a temperature-like quantity T(IS). For monocomponent crystal-formers, T(IS) agrees well with the crystallization temperature T(c), while it matches with the onset temperature T(on) for glass-formers. It also agrees with effective temperatures of typical nonequilibrium systems, such as aging glasses, quasi-static shear flows, and quasi-static self-propelled flows. From the unique perspective of inherent structures, our study reveals the nature of effective temperatures and the underlying connections between nonequilibrium and equilibrium systems and confirms the equivalence between T(on) and T(c). American Association for the Advancement of Science 2021-07-28 /pmc/articles/PMC8318365/ /pubmed/34321210 http://dx.doi.org/10.1126/sciadv.abg6766 Text en Copyright © 2021 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). https://creativecommons.org/licenses/by-nc/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license (https://creativecommons.org/licenses/by-nc/4.0/) , which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited.
spellingShingle Research Articles
Zhang, Jianhua
Zheng, Wen
Zhang, Shiyun
Xu, Ding
Nie, Yunhuan
Jiang, Zhehua
Xu, Ning
Unifying fluctuation-dissipation temperatures of slow-evolving nonequilibrium systems from the perspective of inherent structures
title Unifying fluctuation-dissipation temperatures of slow-evolving nonequilibrium systems from the perspective of inherent structures
title_full Unifying fluctuation-dissipation temperatures of slow-evolving nonequilibrium systems from the perspective of inherent structures
title_fullStr Unifying fluctuation-dissipation temperatures of slow-evolving nonequilibrium systems from the perspective of inherent structures
title_full_unstemmed Unifying fluctuation-dissipation temperatures of slow-evolving nonequilibrium systems from the perspective of inherent structures
title_short Unifying fluctuation-dissipation temperatures of slow-evolving nonequilibrium systems from the perspective of inherent structures
title_sort unifying fluctuation-dissipation temperatures of slow-evolving nonequilibrium systems from the perspective of inherent structures
topic Research Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8318365/
https://www.ncbi.nlm.nih.gov/pubmed/34321210
http://dx.doi.org/10.1126/sciadv.abg6766
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