Motility-induced phase separation and frustration in active matter swarmalators

Journal Article · 25 February 2024 · Physical Review. E

DOI: https://doi.org/10.1103/physreve.109.024607 · OSTI ID:2467374

Adorjáni, B.  ^[1]; Libál, A.  ^[1]; Reichhardt, Charles  ^[2]; Reichhardt, Cynthia Jane Olson  ^[2]

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1. Babes-Bolyai University, Cluj (Romania)
2. Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Here we introduce a two dimensional system of active matter swarmalators composed of elastically interacting run-and-tumble active disks with an internal parameter Φ_i. The disks experience an additional attractive or repulsive force with neighboring disks depending upon their relative difference in Φ_i, making them similar to swarmalators used in robotic systems. In the absence of the internal parameter, the system forms a motility-induced phase separated (MIPS) state, but when the swarmalator interactions are present, a wide variety of other active phases appear depending upon whether the interaction is attractive or repulsive and whether the particles act to synchronize or ant-synchronize their internal parameter values. These phases include a gas-free gel regime, arrested clusters, a labyrinthine state, a regular MIPS state, a frustrated MIPS state for attractive antisynchronization, and a superlattice MIPS state for attractive synchronization.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE National Nuclear Security Administration (NNSA)
• Grant/Contract Number: 89233218CNA000001
• OSTI ID: 2467374
• Report Number(s): LA-UR--23-30664
• Journal Information: Physical Review. E, Journal Name: Physical Review. E Journal Issue: 2 Vol. 109; ISSN 2470-0045
• Publisher: American Physical Society (APS)Copyright Statement
• Country of Publication: United States
• Language: English