Regensburg 2016 – wissenschaftliches Programm

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BP: Fachverband Biologische Physik

BP 39: Active Matter (Joint Session with DY)

BP 39.1: Hauptvortrag

Mittwoch, 9. März 2016, 09:30–10:00, H46

Nonreciprocal forces in soft matter systems: passive particles become active — •Hartmut Löwen — Institute of Theoretical Physics: Soft Matter, Heinrich-Heine University Duesseldorf,

There is a variety of situations in which Newton’s third law is violated. Generally, the action-reaction symmetry can be broken for mesoscopic colloidal particles, when their effective interactions are mediated by a nonequilibrium environment. Here, we investigate different classes of nonreciprocal interactions relevant to real experimental situations and present their basic statistical mechanics analysis verify the principal theoretical predictions in experimental tests performed with two-dimensional binary complex plasmas [1]. For underlying Brownian dynamics [2], nonreciprocal forces result in active particle pairs thus linking nonreciprocal interactions to the field of microswimmers.

References:

[1] A. V. Ivlev, J. Bartnick, M. Heinen, C.-R. Du, V. Nosenko, H. Löwen, Physical Review X 5, 011035 (2015).

[2] J. Bartnick, M. Heinen, A. V. Ivlev, H. Löwen, J. Phys.: Condensed Matter 28, 025102 (2016).