4.7 Article

Linear response to leadership, effective temperature, and decision making in flocks

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PHYSICAL REVIEW E
卷 94, 期 2, 页码 -

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AMER PHYSICAL SOC
DOI: 10.1103/PhysRevE.94.022612

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  1. Netherlands Organization for Scientific Research (NWO/OCW), as part of the Frontiers of Nanoscience program

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Large collections of autonomously moving agents, such as animals or micro-organisms, are able to flock coherently in space even in the absence of a central control mechanism. While the direction of the flock resulting from this critical behavior is random, this can be controlled by a small subset of informed individuals acting as leaders of the group. In this article we use the Vicsek model to investigate how flocks respond to leadership and make decisions. Using a combination of numerical simulations and continuous modeling we demonstrate that flocks display a linear response to leadership that can be cast in the framework of the fluctuation-dissipation theorem, identifying an effective temperature reflecting how promptly the flock reacts to the initiative of the leaders. The linear response to leadership also holds in the presence of two groups of informed individuals with competing interests, indicating that the flock's behavioral decision is determined by both the number of leaders and their degree of influence.

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