Issue 28, 2021

Machine learning for phase behavior in active matter systems

Abstract

We demonstrate that deep learning techniques can be used to predict motility-induced phase separation (MIPS) in suspensions of active Brownian particles (ABPs) by creating a notion of phase at the particle level. Using a fully connected network in conjunction with a graph neural network we use individual particle features to predict to which phase a particle belongs. From this, we are able to compute the fraction of dilute particles to determine if the system is in the homogeneous dilute, dense, or coexistence region. Our predictions are compared against the MIPS binodal computed from simulation. The strong agreement between the two suggests that machine learning provides an effective way to determine the phase behavior of ABPs and could prove useful for determining more complex phase diagrams.

Graphical abstract: Machine learning for phase behavior in active matter systems

Article information

Article type
Paper
Submitted
19 Feb 2021
Accepted
23 Jun 2021
First published
28 Jun 2021

Soft Matter, 2021,17, 6808-6816

Author version available

Machine learning for phase behavior in active matter systems

A. R. Dulaney and J. F. Brady, Soft Matter, 2021, 17, 6808 DOI: 10.1039/D1SM00266J

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