随机方向重设下的主动布朗粒子

IF 2.8 2区 物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY
Yanis Baouche, Thomas Franosch, Matthias Meiners and Christina Kurzthaler
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引用次数: 0

摘要

我们采用更新过程来描述随机方向重置下活动布朗粒子的时空动态。通过计算实验可获得的中间散射函数(ISF)和重建随时间变化的全部位移分布,我们研究了旋转扩散和重置的相互作用。重置过程引入了一个新的时空机制,反映了在大长度尺度上沿重置方向的定向运动,这在 ISF 的虚部中变得很明显。我们进一步推导出了位移低阶矩的分析表达式,并发现方差在长时间内显示出有效的扩散机制,这种机制随着重置率的增加而减小。在中间时间,动态特征为负偏度以及非零非高斯参数。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Active Brownian particle under stochastic orientational resetting
We employ renewal processes to characterize the spatiotemporal dynamics of an active Brownian particle under stochastic orientational resetting. By computing the experimentally accessible intermediate scattering function (ISF) and reconstructing the full time-dependent distribution of the displacements, we study the interplay of rotational diffusion and resetting. The resetting process introduces a new spatiotemporal regime reflecting the directed motion of agents along the resetting direction at large length scales, which becomes apparent in an imaginary part of the ISF. We further derive analytical expressions for the low-order moments of the displacements and find that the variance displays an effective diffusive regime at long times, which decreases for increasing resetting rates. At intermediate times the dynamics are characterized by a negative skewness as well as a non-zero non-Gaussian parameter.
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来源期刊
New Journal of Physics
New Journal of Physics 物理-物理:综合
CiteScore
6.20
自引率
3.00%
发文量
504
审稿时长
3.1 months
期刊介绍: New Journal of Physics publishes across the whole of physics, encompassing pure, applied, theoretical and experimental research, as well as interdisciplinary topics where physics forms the central theme. All content is permanently free to read and the journal is funded by an article publication charge.
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