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

Abstract

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.

arXiv commentComment in print in Phys. Rev. Lett.; for accompanying reply see arXiv Brambilla et al. (Monday 18.10.2010)

References in corpus (4)

• Probing the equilibrium dynamics of colloidal hard spheres above the mode-coupling glass transition
• Effect of Composition Changes on the Structural Relaxation of a Binary Mixture
• Mixing effects for the structural relaxation in binary hard-sphere liquids
• Brambilla, et al. Reply

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