Regensburg 2019 – wissenschaftliches Programm

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BP: Fachverband Biologische Physik

BP 6: Poster I

BP 6.2: Poster

Montag, 1. April 2019, 17:30–19:30, Poster B2

A phase field crystal approach to active systems with inertia — •Dominic Arold and Michael Schmiedeberg — Institut für Theoretische Physik 1, Friedrich-Alexander-Universität Erlangen-Nürnberg, Staudtstrasse 7, 91058 Erlangen, Germany

A phase field crystal approach for active systems consisting of particles with inertia is investigated. In our model the direction of the inertia given by the velocity can be different from the direction of the self-propulsion due to the activity. The implementation of the inertia is motivated by the derivation of an phase field crystal model of underdamped passive particle from a dynamical density functional theory [1], while the activity is modelled as in a phase field crystal model of active systems without inertia [2,3]. In the overdamped regime the results of the latter model can be reproduced including the formation of stable resting or migrating crystals. In the opposite underdamped regime where inertial effects become relevant the migrating crystalline order is destroyed due to the high self-propulsion strength and a chaotic behaviour is observed instead.

=0pt [1] A. J. Archer, J. Chem. Phys. 130, 014509 (2009).

[2] A. Menzel and H. Löwen, Phys. Rev. Lett. 110, 055702 (2013).

[3] A. Menzel, T. Ohta and H. Löwen, Phys. Rev. E 89, 022301 (2014).