Past colloquia and seminars


Curvature-induced defect unbinding in active nematic tori

General public Colloquium / Congress / Forum
12.12.2018 17:15 - 13.12.2018 18:15

We will discuss our recent results with active nematic liquid crystals on toroidal surfaces and show how, despite the intrinsic activity and out-of-equilibrium character of our system, we still observe remnants of the expected curvature-induced defect unbinding predicted for nematics in their ground state. In our experiments, however, the number of defects is far larger than what one would expect for conventional nematics. In addition, these defects move throughout the toroidal surface and arrange in unexpected ways when compared to conventional nematics. Comparing our results to numerical simulations, we unravel the key role of activity in these findings via defect creation and annihilation events.

When? 12.12.2018 17:15    -    13.12.2018 18:15
Where? PER 08 0.51, bâtiment de Physique
Chemin du Musée 3
1700 Fribourg
speaker Prof. Alberto Fernandez-Nieves
School of Physics, Georgia Tech (USA)
Department of Condensed Matter Physics, University of Barcelona
ICREA - Institució Catalana de Recerca i Estudis Avançats, Barcelona
Contact Dr. Véronique Trappe
Chemin du Musée 3
1700 Fribourg
026 300 91 19 3