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Interplay between particle trapping and heterogeneity in anomalous diffusion [Elektronski vir]Ribeiro, Haroldo V. ...Heterogeneous media diffusion is often described using position-dependent diffusion coefficients and estimated indirectly through mean squared displacement in experiments. This approach may overlook ... other mechanisms and their interaction with position-dependent diffusion, potentially leading to erroneous conclusions. Here, we introduce a hybrid diffusion model that merges a position-dependent diffusion coefficient with the trapping mechanism of the comb model. We derive exact solutions for position distributions and mean squared displacements, validated through simulations of Langevin equations. Our model shows that the trapping mechanism attenuates the impact of media heterogeneity. Superdiffusion occurs when the position-dependent coefficient increases superlinearly, while subdiffusion occurs for sublinear and inverse power-law relations. This nontrivial interplay between heterogeneity and state-independent mechanisms also leads to anomalous yet Brownian, and non-Brownian yet Gaussian regimes. These findings emphasize the need for cautious interpretations of experiments and highlight the limitations of relying solely on mean squared displacements or position distributions for diffusion characterization.Source: Communications physics [Elektronski vir]. - ISSN 2399-3650 (Vol. 6, article no. 244, 2023, 11 str.)Type of material - e-article ; adult, seriousPublish date - 2023Language - englishCOBISS.SI-ID - 164715523
Author
Ribeiro, Haroldo V. |
Tateishi, Angel A. |
Lenzi, Ervin K. |
Magin, Richard L. |
Perc, Matjaž
Topics
ujetje delca |
heterogenost |
difuzija |
statistična fizika |
particle trapping |
heterogeneity |
diffusion |
statistical physics
Author | Ribeiro, Haroldo V. ... |
Title | Interplay between particle trapping and heterogeneity in anomalous diffusion [Elektronski vir] |
Publication date | 2023-09-08 |
COBISS.SI-ID | 164715523 |
Publication version in repository | Unidentified |
Publication licence | Creative Commons Attribution 4.0 International |
Embargo | Unidentified |
Project(s) from which the publication was funded
Title | Acronym | Project ID | Funder |
---|---|---|---|
Fazni prehodi proti koordinaciji v večplastnih omrežjih | J1-2457-2020 |
Javna agencija za znanstvenoraziskovalno in inovacijsko dejavnost Republike Slovenije |
|
Računsko intenzivni kompleksni sistemi | P1-0403-2019 |
Javna agencija za znanstvenoraziskovalno in inovacijsko dejavnost Republike Slovenije |
Costs of publication
Cost type | Total cost | Payments |
---|---|---|
APC – Article Processing Charge | 3836.90 € |
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Ribeiro, Haroldo V. | |
Tateishi, Angel A. | |
Lenzi, Ervin K. | |
Magin, Richard L. | |
Perc, Matjaž | 23428 |
Source: Personal bibliographies
and: SICRIS
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