Self-diffusion in strongly coupled Yukawa systems (complex plasmas)

TL;DR

This paper demonstrates that a previously proposed mapping between Newtonian and Brownian diffusivities applies to Yukawa systems, providing insights into self-diffusion in strongly coupled complex plasmas.

Contribution

It extends the diffusivity mapping concept to Yukawa interactions, relevant for complex plasmas, and discusses its implications for self-diffusion.

Findings

Mapping applies to Yukawa systems.

Implications for self-diffusion in dusty plasmas.

Supports universality of diffusivity relations.

Abstract

We show that the idea of mapping between the Newtonian and Brownian diffusivities proposed and tested on a class of particle systems interacting via soft and ultra-soft potentials (IPL, Gaussian core, Hertzian, and effective star-polymer) by Pond {\it et al}., [Soft Matter {\bf 7}, 9859 (2011)] is also applicable to the Yukawa (screened Coulomb) interaction. Some of the implications of this result with respect to self-diffusion in strongly coupled complex (dusty) plasmas are discussed.