Regensburg 2019 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 57: Talk Alberto Fernandes-Nieves

DY 57.1: Hauptvortrag

Freitag, 5. April 2019, 09:30–10:00, H3

Toroidal droplets, active nematics and topological defects — •Alberto Fernandez-Nieves — School of Physics, Georgia Tech (USA) — Department of Condensed Matter Physics, University of Barcelona (Spain) — ICREA - Institució Catalana de Recerca i Estudis Avançats, Barcelona (Spain)

In this talk, I will briefly discuss our recent work with toroidal droplets: How to make them, how they evolve, and how to stabilize them. I will then discuss how active nematics organize on a torus and show that despite the activity and inherent out-of-equilibrium nature of our experimental system, we see traces of the ground-state expectations --curvature induced defect unbinding-- for passive nematics. However, activity augments the behavior leading to completely unexpected positive and negative defect distributions and a very rich overall dynamic behavior.