Erratum: “Fickian yet non-Gaussian behaviour: A dominant role of the intermittent dynamics” [J. Chem. Phys. 146, 134504 (2017)]

Transport of probe particles in a polymer network: effects of probe size, network rigidity and probe–polymer interaction

“…However, the physical origin of the non-Gaussianity in the displacement distribution remains an open question [79]. This has been rationalized with the hypothesis that a tracer can have a distribution of random diffusivities which can lead to a slower (or caged) and faster motion in a complex environment [80][81][82][83][84][85]. Still, a consensus is lacking on the physical picture of the anomalous diffusion and non-Gaussian distribution of passive tracer particles in a complex and crowded environment [1].…”

Non-Gaussian information of heterogeneity in soft matter

“…In the presence of such microscopic heterogeneity, the molecular displacement distributions generically deviate from Gaussianity [6,. This is observed ubiquitously in soft matter [15,17,18,20,22,23,[25][26][27]32]: from bio-molecules to glassy liquids. However, the dynamics is essentially bounded by the central limit theorem and thus the distribution reverts to a Gaussian form at timescales much larger than those of molecular relaxation [23,[27][28][29][30][31].…”