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arXiv 1710.09448cond-mat.stat-mech
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双组分非加性硬盘等离子体中的无序超均匀性

Disordered hyperuniformity in two-component non-additive hard disk plasmas

E. Lomba, J. J. Weis, S. Torquato

摘要:

本文研究了由非加性硬盘组成的具有对数库仑相互作用的双组分等离子体的行为。由于库仑排斥,长波长的总密度涨落被抑制,系统是全局超均匀的。短程体积效应分别导致正或负非加和性的相分离或杂配位。这些效应与超均匀性所带来的隐藏的长程序相竞争。因此,混合物的临界行为被修改,当系统被充电时,长波长的浓度波动被部分阻尼。它还表明,由于超均匀性的组态熵的减少源于超过两个粒子的水平的贡献。最后,尽管全局超均匀性,我们表明,在我们的系统中,与每个组件分别相关的空间配置不是超均匀的,即,该系统不是“多超均匀的”。"

英文摘要:

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."

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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