Stability phase diagram of active Brownian particles
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PhysRevResearch.2.023010.pdf
Description
Published version
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1.88 MB
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Author(s)
Nie, Pin
Chattoraj, Joyjit
Piscitelli, Antonio
Doyle, Patrick
Ni, Ran
Ciamarra, Massimo Pica
Date Issued
2020
Journal
Physical Review Research
Publisher
American Physical Society
Citation
Nie, Pin, Chattoraj, Joyjit, Piscitelli, Antonio, Doyle, Patrick, Ni, Ran et al. 2020. "Stability phase diagram of active Brownian particles." Physical Review Research, 2 (2).
Version
Final published version
Abstract
Phase separation in a low-density gas-like phase and a high-density liquid-like one is a common trait of biological and synthetic self-propelling particle systems. The competition between motility and stochastic forces is assumed to fix the boundary between the homogeneous and the phase-separated phase. Here we demonstrate that, on the contrary, motility does also promote the homogeneous phase allowing particles to resolve their collisions. This understanding allows quantitatively predicting the spinodal line of hard self-propelling Brownian particles, the prototypical model exhibiting a motility-induced phase separation. Furthermore, we demonstrate that frictional forces control the physical process by which motility promotes the homogeneous phase. Hence, friction emerges as an experimentally variable parameter to control the motility-induced phase diagram.
MIT Department
Singapore-MIT Alliance in Research and Technology (SMART)
Massachusetts Institute of Technology. Department of Chemical Engineering
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Creative Commons Attribution
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DOI of Published Version
https://doi.org/10.1103/physrevresearch.2.023010
