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DTSTART;VALUE=DATE:20220512T101500
DTEND;VALUE=DATE:20220512T101500
UID:11342@agenda.unifr.ch
DESCRIPTION:It is generally believed that collisions of particles reduce the self-diffusion coefficient. In this work 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. The physical interpretation is quantitatively supported by the force-autocorrelation function, which turns negative with increasing odd-diffusivity. We validate our findings by many body Brownian dynamics simulations in dilute systems.
SUMMARY:Collisions increase self-diffusion in odd-diffusive systems 
CATEGORIES:Autre
LOCATION:PER 08\, 0.58.5\, Chemin du Musée 3\, 1700 Fribourg
URL;VALUE=URI:https://agenda.unifr.ch/e/fr/11342
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