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arXiv 2510.04575cond-mat.stat-mechcond-mat.dis-nn
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由非互易力驱动的向主动湍流的有向渗流转变

Directed percolation transition to active turbulence driven by non-reciprocal forces

Juliane U. Klamser, Ludovic Berthier

AI总结:

本研究通过数值模拟发现,非互易成对力驱动的稠密粒子系统在临界力振幅下会发生符合有向渗流普适类的动力学相变,从吸收态转变为类主动湍流的混沌态,该转变在局域驱动稠密无序材料中具有普适性。

摘要:

我们通过数值模拟研究了受振幅为$κ$的非互易成对力驱动的稠密粒子集合的集体动力学行为。在临界值$κ_{\rm c}$处,系统经历动力学相变,从吸收态($κ< κ_{\rm c}$)转变为混沌稳态($κ> κ_{\rm c}$)。混沌相的特征是非平凡的时空速度关联与混合,让人联想到自推进系统中的主动湍流。混沌的急剧起始表现出与有向渗流普适类一致的临界标度行为。我们认为这种转变在一大类局域驱动的稠密无序材料中具有普适性。

英文摘要:

We numerically study the collective dynamics of dense particle assemblies driven by non-reciprocal pairwise forces of amplitude $κ$. At a critical value $κ_{\rm c}$, the system undergoes a dynamical phase transition from an absorbing state ($κ< κ_{\rm c}$) to a chaotic steady state ($κ> κ_{\rm c}$). The chaotic phase is marked by nontrivial spatiotemporal velocity correlations and mixing, reminiscent of active turbulence in self-propelled systems. The sharp onset of chaos shows critical scaling consistent with the universality class of directed percolation. We argue that this transition is generic to a broad class of locally-driven, dense disordered materials.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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