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Emergent probability fluxes in confined microbial navigation

Title data

Cammann, Jan ; Schwarzendahl, Fabian Jan ; Ostapenko, Tanya ; Lavrentovich, Danylo ; Bäumchen, Oliver ; Mazza, Marco G.:
Emergent probability fluxes in confined microbial navigation.
PNAS
In: Proceedings of the National Academy of Sciences of the United States of America. Vol. 118 (2021) Issue 39 . - No. e2024752118.
ISSN 1091-6490
DOI: https://doi.org/10.1073/pnas.2024752118

Abstract in another language

When the motion of a motile cell is observed closely, it appears erratic, and yet the combination of nonequilibrium forces and surfaces can produce striking examples of organization in microbial systems. While most of our current understanding is based on bulk systems or idealized geometries, it remains elusive how and at which length scale self-organization emerges in complex geometries. Here, using experiments and analytical and numerical calculations, we study the motion of motile cells under controlled microfluidic conditions and demonstrate that probability flux loops organize active motion, even at the level of a single cell exploring an isolated compartment of nontrivial geometry. By accounting for the interplay of activity and interfacial forces, we find that the boundary’s curvature determines the nonequilibrium probability fluxes of the motion. We theoretically predict a universal relation between fluxes and global geometric properties that is directly confirmed by experiments. Our findings open the possibility to decipher the most probable trajectories of motile cells and may enable the design of geometries guiding their time-averaged motion.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: Active matter; Microswimmers; Nonequilibrium statistical mechanics; Probability fluxes; Microbial motility
Institutions of the University: Faculties
Faculties > Faculty of Mathematics, Physics und Computer Science
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Experimental Physics V
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Experimental Physics V > Chair Experimental Physics V - Univ.-Prof. Dr. Oliver Bäumchen
Profile Fields > Advanced Fields > Nonlinear Dynamics
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 530 Physics
Date Deposited: 04 Oct 2021 09:55
Last Modified: 07 Oct 2021 08:53
URI: https://eref.uni-bayreuth.de/id/eprint/67147