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Length Scales in Brownian yet Non-Gaussian Dynamics
https://oist.repo.nii.ac.jp/records/2223
https://oist.repo.nii.ac.jp/records/2223e513d34a-d37f-4cca-812f-c1939c5b139f
名前 / ファイル | ライセンス | アクション |
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Miotto-2021-Length Scales in Brownian yet Non- (1.6 MB)
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CC BY 4.0
Creative Commons Attribution 4.0 International (https://creativecommons.org/licenses/by/4.0/) |
Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2021-09-06 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Length Scales in Brownian yet Non-Gaussian Dynamics | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | journal article | |||||
著者(英) |
Miotto, José M.
× Miotto, José M.× Pigolotti, Simone× Chechkin, Aleksei V.× Roldán-Vargas, Sándalo |
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書誌情報 |
en : Physical Review X 巻 11, 号 3, 発行日 2021-07-02 |
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抄録 | ||||||
内容記述タイプ | Other | |||||
内容記述 | According to the classical theory of Brownian motion, the mean-squared displacement of diffusing particles evolves linearly with time, whereas the distribution of their displacements is Gaussian. However, recent experiments on mesoscopic particle systems have discovered Brownian yet non-Gaussian regimes where diffusion coexists with an exponential tail in the distribution of displacements. Here we show that, contrary to the present theoretical understanding, the length scale lambda associated with this exponential distribution does not necessarily scale in a diffusive way. Simulations of Lennard-Jones systems reveal a behavior lambda similar to t(1/)(3) in three dimensions and lambda similar to t(1/2) in two dimensions. We propose a scaling theory based on the idea of hopping motion to explain this result. In contrast, simulations of a tetrahedral gelling system, where particles interact by a nonisotropic potential, yield a temperature-dependent scaling of lambda. We interpret this behavior in terms of an intermittent hopping motion. Our findings link the Brownian yet non-Gaussian phenomenon with generic features of glassy dynamics and open new experimental perspectives on the class of molecular and supramolecular systems whose dynamics is ruled by rare events. | |||||
出版者 | ||||||
出版者 | American Physical Society | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 2160-3308 | |||||
DOI | ||||||
関連タイプ | isIdenticalTo | |||||
識別子タイプ | DOI | |||||
関連識別子 | info:doi/10.1103/PhysRevX.11.031002 | |||||
関連サイト | ||||||
識別子タイプ | URI | |||||
関連識別子 | https://journals.aps.org/prx/abstract/10.1103/PhysRevX.11.031002 | |||||
著者版フラグ | ||||||
出版タイプ | VoR | |||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 |