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Crystallisation in active suspensions

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If you have a question about this talk, please contact Marco Vona.

Experiments have shown that phoretic colloids and bacterial suspensions spontaneously crystallise at boundaries. Equilibrium theories of the liquid-solid transition, based on inter-particle potentials, are inapplicable to these non-equilibrium situations. Therefore, we construct a theory in which inter-particle forces and torques, rather than potentials, play a central role in determining collective states. The active forces and torques entering the theory can be computed exactly in the limit of slow viscous flow. The resulting collective dynamics and steady states are in agreement with experiment.

This talk is part of the Biolunch Seminar series.

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