Unusual transport in odd-diffusive systems
Date, Time: 16.09, 15:00 - 16:00
Speaker: Erik Kalz, Institute of Physics and Astronomy, University of Potsdam, Germany
Odd systems, characterised by broken time-reversal or parity symmetry, exhibit striking transport phenomena due to transverse responses. In this talk, I will introduce the concept of odd diffusion, a generalisation of diffusion in two-dimensional systems that incorporates antisymmetric tensor components. Focusing on systems of interacting particles, I adapt a geometric approach to derive effective transport equations and show how interactions give rise to unusual transport in odd systems. I present effects like enhanced self-diffusion, reversed Hall drift and even absolute negative mobility that solely originate in odd diffusion. These results reveal how microscopic symmetry-breaking, encoded in unsual autocorrelation functions, gives rise to emergent equilibrium and non-equilibrium transport with implications for soft matter, chiral active systems, and topological materials.