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DY: Fachverband Dynamik und Statistische Physik
DY 38: Active Matter IV (joint session DY/BP/CPP)
DY 38.4: Talk
Thursday, March 30, 2023, 10:30–10:45, ZEU 160
The interaction-expansion method: a systematic derivation strategy for active field theories⋆ — •Michael te Vrugt1,2, Jens Bickmann1,2, Stephan Bröker1,2, Tobias Frohoff-Hülsmann1, Eyal Heifetz3, Michael E. Cates4, Uwe Thiele1,5,6, and Raphael Wittkowski1,2,5 — 1Institut für Theoretische Physik, Westfälische Wilhelms-Universität Münster, 48149 Münster, Germany — 2SoN, Westfälische Wilhelms-Universität Münster — 3Porter School of the Environment and Earth Sciences, Tel Aviv University, 69978 Tel Aviv, Israel — 4DAMTP, Centre for Mathematical Sciences, University of Cambridge, Cambridge CB3 0WA, United Kingdom — 5CeNoS, Westfälische Wilhelms-Universität Münster — 6CMTC, Westfälische Wilhelms-Universität Münster
Field-theoretical models have made enormous contributions to our understanding of the collective dynamics of active matter. In this contribution, we introduce the interaction-expansion method (IEM) [1], which allows for a systematic derivation of active field theories from the microscopic dynamics of individual particles. We then discuss some recent applications of the IEM to particles with orientation-dependent propulsion speed [2] and particles with inertia [3].
[1] M. te Vrugt et al., in preparation (2022)
[2] S. Bröker et al., arXiv:2210.13357 (2022)
[3] M. te Vrugt et al., Nature Communications (provisionally accepted), arXiv:2204.03018 (2022)
⋆Funded by the Deutsche Forschungsgemeinschaft (DFG)–283183152