Bottinelli Arianna, Sumpter David T J, Silverberg Jesse L
Mathematics Department, Uppsala University, Lägerhyddsvägen 1, Uppsala 75106, Sweden.
Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, Massachusetts 02115, USA.
Phys Rev Lett. 2016 Nov 25;117(22):228301. doi: 10.1103/PhysRevLett.117.228301. Epub 2016 Nov 23.
Collective motion of large human crowds often depends on their density. In extreme cases like heavy metal concerts and black Friday sales events, motion is dominated by physical interactions instead of conventional social norms. Here, we study an active matter model inspired by situations when large groups of people gather at a point of common interest. Our analysis takes an approach developed for jammed granular media and identifies Goldstone modes, soft spots, and stochastic resonance as structurally driven mechanisms for potentially dangerous emergent collective motion.
大量人群的集体运动通常取决于他们的密度。在诸如重金属音乐会和黑色星期五促销活动等极端情况下，运动主要由身体互动而非传统社会规范主导。在此，我们研究一种受大量人群聚集在共同兴趣点的情况启发的活性物质模型。我们的分析采用了一种为堵塞颗粒介质开发的方法，并将戈德斯通模式、软点和随机共振识别为潜在危险的涌现集体运动的结构驱动机制。
