Dresden 2020 – scientific programme
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DY: Fachverband Dynamik und Statistische Physik
DY 2: Active Matter I (joint session BP/CPP/DY)
DY 2.8: Talk
Monday, March 16, 2020, 12:00–12:15, HÜL 386
Self-organization of active surfaces — •Alexander Mietke1,2,3,4,7, V. Jemseena5, K. Vijay Kumar5, Ivo F. Sbalzarini2,3,4,6, and Frank Jülicher1,3,6 — 1MPI for the Physics of Complex Systems — 2Faculty of Computer Science, TU Dresden — 3Center for Systems Biology Dresden — 4MPI of Molecular Cell Biology and Genetics — 5ICTS-TIFR — 6Cluster of Excellence PoL, TU Dresden — 7Department of Mathematics, MIT, Cambridge, MA
Self-organization of morphogenetic events often arises through a feedback loop in which active forces, by inducing deformations and material flows, indirectly affect their own mechano-chemical regulation. In recent years, the existence of generic mechano-chemical patterning mechanisms in simple, fixed geometries has been demonstrated theoretically and experimentally. However, the interplay of mechano-chemical processes with the surface geometry remains to be explored. In our work, we employ the theory of active gels in complex geometries to study the properties of dynamically evolving active surfaces. Within those surfaces, diffusive and advective transport processes can redistribute molecules responsible for local stress generation. This resembles the interplay between active forces, the shape changes they imply and the effects this has on their regulation. Within our framework, a contractile ring formation, as well as the peristaltic motion of active tubular structures can be understood as natural emergent phenomena. Our approach provides novel opportunities to explore different scenarios of mechano-chemical self-organization and can help to better understand the role of shape as a regulatory element in morphogenetic processes.