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对“模式耦合玻璃化转变上方胶体硬球平衡动力学的探讨”一文的评论

Comment on "Probing the equilibrium dynamics of colloidal hard spheres above the mode-coupling glass transition"

Johannes Reinhardt, Fabian Weysser, Matthias Fuchs

摘要:

在信[PRL 102,085703(2009)]中,Brambilla等人声称在高于模式耦合理论(MCT)的临界填充分数的胶体硬球中观察到活化动力学。通过进行微观MCT计算,我们表明,在他们的系统中的多分散性转移的临界填充分数以上的值由van Megen等人确定的。对于较少的多分散性样品,数据与理论一致,除了,可能的,最高的填充分数。

英文摘要:

In the Letter [PRL 102, 085703 (2009)] Brambilla, et al. claimed to observe activated dynamics in colloidal hard spheres above the critical packing fraction of mode coupling theory (MCT). By performing microscopic MCT calculations, we show that polydispersity in their system shifts the critical packing fraction above the value determined by van Megen et al. for less polydisperse samples, and that the data agree with theory except for, possibly, the highest packing fraction.

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