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DY: Fachverband Dynamik und Statistische Physik

DY 34: Focus Session: Fluids with Broken Time-Reversal Symmetry – Odd/Hall Viscosity Between Active Matter and Electron Flows

DY 34.8: Vortrag

Mittwoch, 11. März 2026, 11:45–12:00, ZEU/0160

A mobility based approach to self diffusion in odd-mobile systems — •Filippo Faedi and Abhinav Sharma — University of Augsburg

Odd-diffusive systems, defined by antisymmetric diffusion tensors, display unusual dynamics including enhanced self-diffusion due to interactions, oscillatory force autocorrelation functions in over-damped systems, and reversal of particle mobility. This work introduces a mobility-based approach by externally driving particles with constant forces, uncovering profound transport anomalies. We demonstrate an inverted density wake around a driven tracer, where increasing oddness reverses collision effects, reducing effective friction and enhancing mobility. Using fluctuation-dissipation, mobility-derived self-diffusion confirms prior findings, providing a unified view of interaction-induced anomalous dynamics in chiral media.

Keywords: Odd-particles; self-diffusion; effective mobility; time-reversal symmetry breaking