Regensburg 2025 – wissenschaftliches Programm

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BP: Fachverband Biologische Physik

BP 13: Active Matter III (joint session DY/BP/CPP)

BP 13.2: Vortrag

Dienstag, 18. März 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