Edge current and pairing order transition in chiral bacterial vortices

• DOI: 10.1073/pnas.2107461118
• Publication Date: 2021-09-24T19:55:47Z
• Authors: Kazusa Beppu; Ziane Izri; Tasuku Sato; Yoko Yamanishi; Yutaka Sumino; Yusuke T. Maeda
• Keywords: Chirality; Active matter

Significance The last two decades have seen an exciting development in the field of active turbulence microswimmers and their control using geometric design. While being recognized as a key feature turbulence, collective effects chiral matter been overlooked. We shed light on poorly understood interplay between individual swimming axisymmetric boundary conditions mediated by polar alignment exhibiting controlling bacterial vortices. geometry-independent motion that appears near boundary, named edge current, plays important role alters rule pairing Our findings provide physical basis for understanding out-of-equilibrium structures advancing material transport engineering microrobots liquid.