Discriminating between anomalous diffusion and transient behavior in microheterogeneous environments.
Diffusion in macrohomogeneous and microheterogeneous media can be described as effective free diffusion only at sufficiently long times. At intermediate times, the mean-square displacement of a diffusing object shows a transient behavior that can be misinterpreted as anomalous subdiffusion. We discuss how to discriminate between the two.
Program in Physical Biology, Eunice Kennedy Shriver National Institute of Child Health and Human Development, Center for Information Technology, National Institutes of Health, Bethesda, Maryland; Mathematical and Statistical Computing Laboratory, Division for Computational Bioscience, Center for Information Technology, National Institutes of Health, Bethesda, Maryland.
Alexander M
AM
Berezhkovskii
Mathematical and Statistical Computing Laboratory, Division for Computational Bioscience, Center for Information Technology, National Institutes of Health, Bethesda, Maryland; Departamento de Fisica, Universidad Autonoma Metropolitana, Iztapalapa, Mexico.
Leonardo
L
Dagdug
Program in Physical Biology, Eunice Kennedy Shriver National Institute of Child Health and Human Development, Center for Information Technology, National Institutes of Health, Bethesda, Maryland. Electronic address: bezrukos@mail.nih.gov.
Sergey M
SM
Bezrukov
D002463:Cell Membrane Permeability; D004058:Diffusion; D007700:Kinetics; D008954:Models, Biological