速度不均匀性加速了极群中的信息传递
Speed inhomogeneity accelerates the information transfer in polar flock
摘要：
自推进粒子（SPP）的集合显示出相干运动，并在二维中表现出真正的长程有序（LRO）状态。各种研究表明，空间不均匀性的存在可以破坏系统中通常的长程有序。然而，由于颗粒的固有性质的不均匀性的影响几乎没有得到解决。在本文中，我们考虑一个集合的极性SPP移动的速度不均匀（IS）的二维基板上，这可能会出现由于不同的物理强度的单个粒子。令我们惊讶的是，IS不仅保留了通常的长程有序存在于均匀速度模型，但也导致更快的有序系统。此外，与Vicsek类模型系统相比，群对外部扰动的响应也更快，这是由于在IS存在下每个SPP的邻居的频繁更新。因此，我们的研究表明，IS可以帮助更快的信息传递在移动的羊群。
英文摘要：
A collection of self-propelled particles (SPPs) shows coherent motion and exhibits a true long range ordered (LRO) state in two dimensions. Various studies show that the presence of spatial inhomogeneities can destroy the usual long-range ordering in the system. However, the effects of inhomogeneity due to the intrinsic properties of the particles are barely addressed. In this paper we consider a collection of polar SPPs moving with inhomogeneous speed (IS) on a two dimensional substrate, which can arise due to varying physical strength of the individual particle. To our surprise, the IS not only preserves the usual long-range ordering present in the homogeneous speed models but also induces faster ordering in the system. Furthermore, The response of the flock to an external perturbation is also faster, compared to Vicsek like model systems, due to the frequent update of neighbors of each SPP in the presence of the IS. Therefore, our study shows that the IS can help in faster information transfer in the moving flock.
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