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. 2017 Feb 15;3(2):e1601469. doi: 10.1126/sciadv.1601469

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Copyright © 2017, The Authors

This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license, which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited.

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Fig. 6 — (A to D) Snapshots of the emerging dynamic states for H₀ = 11 dimensionless units: gas (f = 6 Hz), flocking (f = 20 Hz), vortex (f = 47 Hz), and reentrant flocking (f = 88 Hz) (see also movies S9 to S12). Arrows indicate the velocity of each particle, and the flocks are highlighted by a green background. (E to H) Corresponding intensity plot of the coarse-grained velocity fields.