20.500.12556/DKUM-88282 Interplay between particle trapping and heterogeneity in anomalous diffusion 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. particle trapping heterogeneity diffusion statistical physics ujetje delca heterogenost difuzija statistična fizika true true true Nature Research Angleški jezik Slovenski jezik Članek v reviji 2024-04-13 04:03:46 2024-09-11 13:46:12 2024-09-12 03:30:24 0000-00-00 00:00:00 2023 0 0 11 str. article no. ǂ244 Vol. 6 2023 0000-00-00 Zaloznikova Objavljeno NiDoloceno 2023-06-27 2023-08-30 2023-09-08 53 164715523 10.1038/s42005-023-01365-z 2399-3650 RAZ_Ribeiro_Haroldo_V._2023.pdf RAZ_Ribeiro_Haroldo_V._2023.pdf 1 D815D6FF64FE66CF36201FE76DBA6E0A 9397c63bb52b92ae650458aff1417a9c0d5c5f68fab6a5e669126605d0c5749c 70651a18-7032-11ef-bcb8-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=184948 https://www.nature.com/articles/s42005-023-01365-z 0 dc5539c8-7032-11ef-bcb8-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=184950 Fakulteta za naravoslovje in matematiko 0 0 0