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Research Paper#Active Matter, Phase Separation, Hydrodynamics🔬 ResearchAnalyzed: Jan 3, 2026 08:40

Stalled Particles Drive Phase Separation in Active Matter

Published:Dec 31, 2025 11:47
1 min read
ArXiv

Analysis

This paper investigates how the presence of stalled active particles, which mediate attractive interactions, can significantly alter the phase behavior of active matter systems. It highlights a mechanism beyond standard motility-induced phase separation (MIPS), showing that even a small fraction of stalled particles can drive phase separation at lower densities than predicted by MIPS, potentially bridging the gap between theoretical models and experimental observations.
Reference

“A small fraction of stalled particles in the system allows for the formation of dynamical clusters at significantly lower densities than predicted by standard MIPS.”

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Research Paper#Active Matter, Phase Separation, Non-equilibrium Physics🔬 ResearchAnalyzed: Jan 3, 2026 08:42

Active Phase Separation Pathways: Necking, Rupture, and Cavitation

Published:Dec 31, 2025 11:00
1 min read
ArXiv

Analysis

This paper investigates the dynamic pathways of a geometric phase transition in an active matter system. It focuses on the transition between different cluster morphologies (slab and droplet) in a 2D active lattice gas undergoing motility-induced phase separation. The study uses forward flux sampling to generate transition trajectories and reveals that the transition pathways are dependent on the Peclet number, highlighting the role of non-equilibrium fluctuations. The findings are relevant for understanding active matter systems more broadly.
Reference

“The droplet-to-slab transition always follows a similar mechanism to its equilibrium counterpart, but the reverse (slab-to-droplet) transition depends on rare non-equilibrium fluctuations.”

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