Journal
PHYSICAL REVIEW LETTERS
Volume 129, Issue 9, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.129.090601
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Funding
- Deutsche Forschungsgemeinschaft (DFG) [SH 1275/3-1, LO 418/25-1]
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It has been discovered that collisions can enhance self-diffusion in odd-diffusive systems, which goes against the common belief. Through analytical predictions and Brownian dynamics simulations, this counterintuitive behavior in the odd-diffusive system has been explained.
It is generally believed that collisions of particles reduce the self-diffusion coefficient. Here we show that in odd-diffusive systems, which are characterized by diffusion tensors with antisymmetric elements, collisions surprisingly can enhance the self-diffusion. In these systems, due to an inherent curving effect, the motion of particles is facilitated, instead of hindered by collisions leading to a mutual rolling effect. Using a geometric model, we analytically predict the enhancement of the self-diffusion coefficient with increasing density. This counterintuitive behavior is demonstrated in the archetypal odd-diffusive system of Brownian particles under Lorentz force. We validate our findings by many-body Brownian dynamics simulations in dilute systems.
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