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Noise-Induced Quenched Disorder in Dense Active Systems
Guozheng Lin1, Zhangang Han1, Amir Shee2
1School of Systems Science, Beijing Normal University, Beijing 100875, People's Republic of China.
Abstract:
We report and characterize the emergence of a noise-induced state of quenched disorder in a generic model describing a dense sheet of active polar disks. In this state, self-propelled disks become jammed with random orientations, only displaying small fluctuations about their mean positions and headings. The quenched disorder phase appears at intermediate noise levels, between moving polar order and standard dynamic disorder. We show that it results from retrograde forces produced by angular fluctuations with Ornstein-Uhlenbeck dynamics, compute its critical noise, and argue that it could emerge in a variety of systems.
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