Effective interactions in active Brownian suspensions
- Farage, Thomas F. F. Department of Physics, University of Fribourg, Switzerland
- Krinninger, Philip Theoretische Physik II, Physikalisches Institut, Universität Bayreuth, Germany
- Brader, Joseph M. Department of Physics, University of Fribourg, Switzerland
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16.04.2015
Published in:
- Physical Review E. - 2015, vol. 91, no. 4, p. 042310
English
Active colloids exhibit persistent motion, which can lead to motility-induced phase separation (MIPS). However, there currently exists no microscopic theory to account for this phenomenon. We report a first-principles theory, free of fit parameters, for active spherical colloids, which shows explicitly how an effective many-body interaction potential is generated by activity and how this can rationalize MIPS. For a passively repulsive system the theory predicts phase separation and pair correlations in quantitative agreement with simulation. For an attractive system the theory shows that phase separation becomes suppressed by moderate activity, consistent with recent experiments and simulations, and suggests a mechanism for reentrant cluster formation at high activity.
- Faculty
- Faculté des sciences et de médecine
- Department
- Département de Physique
- Language
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- English
- Classification
- Physics
- License
- License undefined
- Identifiers
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- RERO DOC 255918
- DOI 10.1103/PhysRevE.91.042310
- Persistent URL
- https://folia.unifr.ch/unifr/documents/304267
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