Disordered hyperuniformity in two-component non-additive hard disk plasmas
Abstract
We study the behavior of a two-component plasma made up of non-additive hard disks with a logarithmic Coulomb interaction. Due to the Coulomb repulsion, long-wavelength total density fluctuations are suppressed and the system is globally hyperuniform. Short-range volume effects lead to phase separation or to hetero-coordination for positive or negative non-additivities, respectively. These effects compete with the hidden long-range order imposed by hyperuniformity. As a result, the critical behavior of the mixture is modified, with long-wavelength concentration fluctuations partially damped when the system is charged. It is also shown that the decrease of configurational entropy due to hyperuniformity originates from contributions beyond the two-particle level. Finally, despite global hyperuniformity, we show that in our system, the spatial configuration associated with each component separately is not hyperuniform, i.e., the system is not "multihyperuniform."
Cite
@article{arxiv.1710.09448,
title = {Disordered hyperuniformity in two-component non-additive hard disk plasmas},
author = {E. Lomba and J. J. Weis and S. Torquato},
journal= {arXiv preprint arXiv:1710.09448},
year = {2017}
}