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  • Title: Nearly logarithmic decay in the colloidal hard-sphere system.
    Author: Sperl M.
    Journal: Phys Rev E Stat Nonlin Soft Matter Phys; 2005 Jun; 71(6 Pt 1):060401. PubMed ID: 16089713.
    Abstract:
    Nearly logarithmic decay is identified in the data for the mean-squared displacement of the colloidal hard-sphere system at the liquid-glass transition [W. van Megen, Phys. Rev. E 58, 6073 (1998)]. The solutions of the mode-coupling theory for the microscopic equations of motion fit the experimental data well. Based on these equations, the nearly logarithmic decay is explained as the equivalent of a beta-peak phenomenon, a manifestation of the critical relaxation when the coupling between of the probe variable and the density fluctuations is strong. In an asymptotic expansion, a Cole-Cole formula including corrections is derived from the microscopic equations of motion, which describes the experimental data for three decades in time.
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