【摘 要】
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Recent experiments and simulations [1-4] observed "Fickian,but non-Gaussian" diffusion,in which case the mean-square displacement(MSD)increases linearly over time while the distribution of particle di
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Recent experiments and simulations [1-4] observed "Fickian,but non-Gaussian" diffusion,in which case the mean-square displacement(MSD)increases linearly over time while the distribution of particle displacement is non-Gaussian.It was speculated that the anomalies arise from the fluctuating but correlated diffusivity in the crowded heterogeneous environment.There have been several theoretical studies of fluctuating diffusivity based on this conjecture [5].But the relation between the non-Gaussian behavior and the heterogeneous environment is still not clear.
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