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Tagged-particle motion in quasi-confined colloidal hard-sphere liquids
Journal of Statistical Mechanics: Theory and Experiment ( IF 2.4 ) Pub Date : 2021-04-07 , DOI: 10.1088/1742-5468/abee23
Lukas Schrack 1 , Charlotte F Petersen 1, 2 , Michele Caraglio 1 , Gerhard Jung 1 , Thomas Franosch 1
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We investigate the tagged-particle motion in a strongly interacting quasi-confined liquid using periodic boundary conditions along the confining direction. Within a mode-coupling theory of the glass transition we calculate the self-nonergodicity parameters and the self-intermediate scattering function and compare them with event-driven molecular dynamics simulations. We observe non-monotonic behavior for the in-plane mean-square displacement and further correlation functions which refer to higher mode indices encoding information about the perpendicular motion. The in-plane velocity-autocorrelation function reveals persistent anti-correlations with a negative algebraic power-law decay t −2 at all packing fractions.



中文翻译:

准限制胶体硬球液体中的标记粒子运动

我们使用沿限制方向的周期性边界条件来研究强相互作用的准限制液体中的标记粒子运动。在玻璃化转变的模式耦合理论中,我们计算自非遍历性参数和自中间散射函数,并将它们与事件驱动的分子动力学模拟进行比较。我们观察到平面内均方位移的非单调行为和进一步的相关函数,这些函数指的是编码关于垂直运动的信息的高模指数。面内速度自相关函数揭示了在所有填充分数下具有负代数幂律衰减t -2 的持续反相关。

更新日期:2021-04-07
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