2026-07-19T20:40:10Zhttps://docta.ucm.es/rest/oai/request

oai:docta.ucm.es:20.500.14352/1349182026-04-22T00:09:32Zcom_20.500.14352_14col_20.500.14352_15

Martín Roca, José Locatelli, Emanuele Bianco, Valentino Malgaretti, Paolo Valeriani, Chantal 2026-04-21T11:11:47Z 2026-04-21T11:11:47Z 2024-10-08 Martín-Roca, José, et al. «Tangentially active polymers in cylindrical channels». SciPost Physics, vol. 17, n.o 4, octubre de 2024, p. 107. DOI.org (Crossref), https://doi.org/10.21468/SciPostPhys.17.4.107. 10.21468/scipostphys.17.4.107 https://hdl.handle.net/20.500.14352/134918 2542-4653 https://dx.doi.org/10.21468/scipostphys.17.4.107 https://scipost.org/10.21468/SciPostPhys.17.4.107 We present an analytical and computational study characterizing the structural and dynamical properties of an active filament confined in cylindrical channels. We first outline the effects of the interplay between confinement and polar self-propulsion on the conformation of the chains. We observe that the scaling of the polymer size in the channel, quantified by the end-to-end distance, shows different anomalous behaviours under different confinement and activity conditions. In particular, we report scaling exponents that are markedly different from their passive counterparts. Interestingly, we show that the universal relation, describing the ratio between the end-to-end distance of passive polymer chains in cylindrical channels and in bulk is broken by activity. Finally, we show that the long-time diffusion coefficient under confinement can be rationalised by an analytical model, that takes into account the presence of the channel and the elongated nature of the polymer. eng http://creativecommons.org/licenses/by/4.0/ open access Attribution 4.0 International Tangentially active polymers in cylindrical channels journal article