3 papers
cond-mat.soft2026
Non-reciprocal torques guide self-assembly of active particles into clusters with controllable function
Till Welker, Yukino Fujiya, Holger Stark
Self-assembly of constituents determines structure formation in the microscopic world. Attractive forces can assemble active particles into colloidal machines, but they do not fix…
cond-mat.stat-mech2026
Accuracy Comes at a Cost: Optimal Localisation Against a Flow
Till Welker, Patrick Pietzonka
How much work does it cost for a propelled particle to stay localised near a stationary target, defying both thermal noise and a constant flow that would carry it away? We study th…
cond-mat.soft2025
Lattice-dependent orientational order in active crystals
Till Welker, Ricard Alert
Via mechanisms not accessible at equilibrium, self-propelled particles can form phases with positional order, such as crystals, and with orientational order, such as polar flocks.…