Noise-Induced Quenched Disorder in Dense Active Systems

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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.
Funding Information
  • National Natural Science Foundation of China (62176022)
  • John Templeton Foundation (62213)
  • China Scholarship Council
  • CHuepe Labs Inc.

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