Carregant...
Fitxers
Tipus de document
ArticleVersió
Versió publicadaData de publicació
Tots els drets reservats
Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/18785
Kinetic equations for difussion in the presence of entropic barriers
Títol de la revista
Director/Tutor
ISSN de la revista
Títol del volum
Recurs relacionat
Resum
We use the mesoscopic nonequilibrium thermodynamics theory to derive the general kinetic equation of a system in the presence of potential barriers. The result is applied to a description of the evolution of systems whose dynamics is influenced by entropic barriers. We analyze in detail the case of diffusion in a domain of irregular geometry in which the presence of the boundaries induces an entropy barrier when approaching the exact dynamics by a coarsening of the description. The corresponding kinetic equation, named the Fick-Jacobs equation, is obtained, and its validity is generalized through the formulation of a scaling law for the diffusion coefficient which depends on the shape of the boundaries. The method we propose can be useful to analyze the dynamics of systems at the nanoscale where the presence of entropy barriers is a common feature.
Matèries (anglès)
Citació
Citació
REGUERA, D. (david), RUBÍ CAPACETI, José miguel. Kinetic equations for difussion in the presence of entropic barriers. _Physical Review E_. 2001. Vol. 64, núm. 6, pàgs. 061106-1-061106-8. [consulta: 23 de gener de 2026]. ISSN: 1063-651X. [Disponible a: https://hdl.handle.net/2445/18785]