Berlin 2018 – scientific programme

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BP: Fachverband Biologische Physik

BP 15: Postersession III

BP 15.76: Poster

Tuesday, March 13, 2018, 14:00–16:00, Poster B

Non-equilibrium dynamics in marginally stable biological networks — •Federico Gnesotto and Chase Broedersz — Arnold Sommerfeld Center for Theoretical Physics and Center for Nanoscience, Ludwig-Maximiians-Universität, D-80333 München

Biological networks such as the actin cytoskeleton of a cell are inherently out of equilibrium. ATP-driven molecular motors constantly exert local stochastic forces on the fibers of these networks, thereby driving these assemblies into a non-equilibrium steady state. How does the network architecture affect this non-equilibrium state? Recent studies have proposed that biological networks are weakly connected and may be poised near a mechanical stability (isostatic) threshold, where the system exhibits critical behavior. Here we investigate how this criticality affects the non-equilibrium dynamics of such marginal networks. To this end, we propose a minimal model of a diluted triangular lattice with tunable connectivity and local motor activity. This essential approach allows us to study how the proximity to a critical point affects the non-equilibrium properties of networks at different length scales.