Phase Separation and Multibody Effects in Three-Dimensional Active Brownian Particles

Research output: Contribution to journalLetter (Academic Journal)peer-review

11 Citations (Scopus)
16 Downloads (Pure)

Abstract

Simulation studies of the phase diagram of repulsive active Brownian particles in three dimensions reveal that the region of motility-induced phase separation between a high and low density phase is enclosed by a region of gas-crystal phase separation. Near-critical loci and structural crossovers can additionally be identified in analogy with simple fluids. Motivated by the striking similarity to the behaviour of equilibrium fluids with short-ranged pair-wise attractions, we show that a direct mapping to pair potentials in the dilute limit implies interactions that are insufficiently attractive to engender phase separation. Instead, this is driven by the emergence of multi-body effects associated with particle caging that occurs at sufficiently high number density. We quantify these effects via information-theoretical measures of $n$-body effective interactions extracted from the configurational structure.
Original languageEnglish
Article number038002
Number of pages6
JournalPhysical Review Letters
Volume126
Issue number3
DOIs
Publication statusPublished - 22 Jan 2021

Bibliographical note

Publisher Copyright:
© 2021 American Physical Society.

Fingerprint

Dive into the research topics of 'Phase Separation and Multibody Effects in Three-Dimensional Active Brownian Particles'. Together they form a unique fingerprint.

Cite this