Supersonic kinks and solitons in active solids

Supersonic kinks and solitons in active solids
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活性固体中的超音速扭结和孤子

DOI:
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发表时间:
2019
期刊:
Philosophical Transactions of the Royal Society A
影响因子:
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通讯作者:
L. Truskinovsky
L. Truskinovsky
中科院分区:
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文献类型:
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作者:
Nikolai Gorbushin;L. Truskinovsky

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为了证明活性物质中稳定传播的非线性波可以在内部驱动,我们开发了一个以恒定超音速移动的拓扑扭结的原型模型。我们使用能够产生主动应力的双稳态质量弹簧(费米-帕斯塔-乌拉姆)链模型。与必然耗散的被动双稳态链中的亚音速扭结相比,所获得的超音速解决方案是纯粹反耗散的。我们的数值实验表明了所获得的扭结型解的稳定性以及传播类似于孤子的扭结-反扭结束的可能性。我们证明,即使是离散模型最简单的准连续近似也能捕获预测活动现象的最重要特征。本文是主题“结构化媒体中的动态现象建模和本地化(第 2 部分)”的一部分。
To show that steadily propagating nonlinear waves in active matter can be driven internally, we develop a prototypical model of a topological kink moving with a constant supersonic speed. We use a model of a bi-stable mass-spring (Fermi–Pasta–Ulam) chain capable of generating active stress. In contrast to subsonic kinks in passive bi-stable chains that are necessarily dissipative, the obtained supersonic solutions are purely anti-dissipative. Our numerical experiments point towards the stability of the obtained kink-type solutions and the possibility of propagating kink-anti-kink bundles reminiscent of solitons. We show that even the simplest quasi-continuum approximation of the discrete model captures the most important features of the predicted active phenomena. This article is part of the theme issue ‘Modelling of dynamic phenomena and localization in structured media (part 2)’.
DOI: 10.1103/revmodphys.85.1143
发表时间: 2013-07-19
影响因子: 44.1
作者:
Marchetti, M. C.;Joanny, J. F.;Simha, R. Aditi
通讯作者: Simha, R. Aditi
DOI: 10.1038/s41567-020-0795-y
发表时间: 2020-03-02
期刊: NATURE PHYSICS
影响因子: 19.6
作者:
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通讯作者: Vitelli, Vincenzo