16-31 July 2019
Aim of the mission
The objective of the STSM was to initiate the study of active knotted fields and to create stable, localised active knotted structures in confined geometries. Specifically, we sought to study the dynamics of knotted disclination lines and of Hopf textures in thin cells, where the bulk instability is suppressed. The STSM aligned particularly with the activities and objectives of EUTOPIA WG5. It facilitated the exchange of expertise between ECIs — Jack Binysh (UK) and Ziga Kos (Slovenia) — as well as their general career development, and also the start of a longer collaboration between the Alexander and Ravnik groups.
The STSM itself invovled a short 15 day visit to Ljubljana (16th — 31st July 2019), although due to prior commitments Alexander (UK) was only able to join from 21st July. The initial days were devoted to integration of numerical code and was undertaken by Binysh and Kos, supervised by Ravnik. This permitted initial simulations of Hopf textures in active cholesterics to begin already before Alexander arrived the following week. The typical pattern for the remainder of the time was for Alexander and Ravnik to discuss in the morning, while Binysh and Kos continued with simulations and analysis, and then the entire team would meet to discuss together in the afternoon. The evenings were devoted to performing calculations for the next morning. Binysh gave his seminar on Knotted Fields on Monday 29th July.