Events

Date: 16 April 2026   Time: 13:00 - 14:00     

Location: MB-503

This event has been cancelled.

Nonreciprocal systems have recently received much interest in the statistical physics community and beyond. One intriguing feature of such systems is their unusual collective behavior including, e.g., spontaneous time-symmetry breaking. These phenomena have been widely studied using hydrodynamic theories, whereas the corresponding particle-level behavior if often less understood. This concerns, in particular, the behavior close to exceptional points appearing at strong nonreciprocity. Here we discuss the connection between field-theoretical and corresponding particle-level results for two types of systems: polar active matter [1,2] and the shepherding problem [3].

[1] K. L. Kreienkamp and S. H. L. Klapp, Phys. Rev. Lett. 133, 258303 (2024), PRE 110, 064135 (2024)
[2] K. L. Kreienkamp and S. H. L. Klapp, Comm. Phys. 8, 307 (2025)
[3] A. Lama, M. di Bernardo and S. H. L. Klapp, Nat. Comm. 16, 8450 (2025)