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Authors
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Kalz, E. ; Vuijk, H. ; Abdoli, I. ; Sommer, J.-U. ; Löwen, H. ; Sharma, A.
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Title
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Collisions enhance self-diffusion in odd-diffusive systems
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Date
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25.08.2022
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Number
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60203
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Abstract
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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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Publisher
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Physical Review Letters
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Wikidata
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Citation
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Physical Review Letters 129 (2022) Article Number: 090601
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DOI
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https://doi.org/10.1103/PHYSREVLETT.129.090601
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