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Reaction-diffusion as active matter

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ADIW04 - Anti-Diffusion in Multiphase and Active Flows

Biomolecular condensates are membraneless organelles ubiquitous across cell biology. Chemical reactions have been proposed as a non-equilibrium mechanism to stabilise the size of condensates. At the same time, active field theories (in particular “Active Model B+”) also predict the formation of stable size-limited microphases. However, an explicit connection between these two systems has been lacking. I will present rigorous results showing how pattern-forming reaction-diffusion systems with conservation laws universally reduce to an extended form of “Active Model B+” at long times. These results provide a direct link between reaction-diffusion systems and active matter. The work I will present is from a collaboration with Thomas Speck (Stuttgart) and Thomas Machon (Bristol):

This talk is part of the Isaac Newton Institute Seminar Series series.

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