# Motile dissenters disrupt the flocking of active granular matter

Source: [Motile dissenters disrupt the flocking of active granular matter](<https://www.sota2.com/research/paper/68fa3c251e209131ce8d8702>)

Collection index: [llms.txt](<https://www.sota2.com/research/llms.txt>)

Data updated: 2025-10-28T13:54:16.778Z

Authors: Pradip K. Bera, A. K. Sood

Published: 2020-02-17T13:32:55.000Z

## Abstract

We report flocking in the dry active granular matter of millimeter-sized two-step-tapered rods without an intervening medium. The system undergoes the flocking phase transition at a threshold area fraction ~ 0.12 having high orientational correlations between the particles. However, the one-step-tapered rods do not flock and are used as the motile dissenters in the flock-forming granular matter. At the critical fraction of dissenters ~ 0.3, the flocking order of the system gets completely destroyed. The variance of the system's order parameter shows a maximum near the dissenter fraction f ~ 0.05, suggesting a finite-size crossover between the ordered and disordered phases.

## Recorded benchmark results

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## Original sources and implementation

[Original paper](<https://arxiv.org/abs/2002.06950>)

[PDF](<https://arxiv.org/pdf/2002.06950.pdf>)