Regensburg 2025 – scientific programme
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BP: Fachverband Biologische Physik
BP 13: Active Matter III (joint session DY/BP/CPP)
BP 13.2: Talk
Tuesday, March 18, 2025, 09:45–10:00, H47
Active Quadrupolar Dumbbells — •Margaret Rosenberg1, Marco Musacchio1, Lorenzo Caprini2, and Hartmut Löwen1 — 1Heinrich-Heine University Düsseldorf, Universitätsstraße 1, 40225 Düsseldorf — 2Università di Roma Sapienza, P.le Aldo Moro 2, 00185 Rome, Italy
The field of Active Matter has thrived in recent years, driven both by the insight that it underlies fundamental processes in nature, and by its vast potential for applications. Although the self-propulsion mechanisms of Active Matter allow us to consider and control a wide range of motions, there is - by default - no obvious control over the orientation and rotation of the particles. One approach to resolve this is the use of anisotropic particles and interactions. This contribution presents a computational study of a novel system composed of active, quadrupolar dumbbells, the phase behavior of which is determined by the competition between active motion and the orthogonal alignment favored by quadrupolar attraction. We explore the novel phase behavior unlocked by these anisotropic interactions, and discuss options for experimental realizations and applications.
Keywords: Active Matter; Quadrupoles; Magnetic