5 papers
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…
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…
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.…
Dividing active and passive particles in nonuniform nutrient environments
Till Welker, Holger Stark
To explore the coupling between a growing population of microorganisms such as E. coli and a nonuniform nutrient distribution, we formulate a minimalistic model. It consists of act…
Collective motion of active particles exhibiting non-reciprocal orientational interactions
Milos Knezevic, Till Welker, Holger Stark
We present a Brownian dynamics study of a 2d bath of active particles interacting among each other through usual steric interactions and, additionally, via non-reciprocal avoidant…