Memorias de investigación
Artículos en revistas:
Tracer diffusion on a crowded random Manhattan lattice
Año:2019
Áreas de investigación
  • Física
Datos
Descripción
We study by extensive numerical simulations the dynamics of a hardcore tracer particle (TP) in presence of two competing types of disorder - frozen convection flows on a square random Manhattan lattice and a crowded dynamical environment formed by a lattice gas of mobile hard-core particles. The latter perform lattice random walks, constrained by a single-occupancy condition of each lattice site, and are either insensitive to random flows (model A) or choose the jump directions as dictated by the local directionality of bonds of the random Manhattan lattice (model B). We focus on the TP disorder-averaged meansquared displacement, (which shows a super-diffusive behaviour ? t4/3, t being time, in all the cases studied here), on higher moments of the TP displacement, and on the probability distribution of the TP position X along the x-axis. Our analysis evidences that in absence of the lattice gas particles the latter has a Gaussian central part ? exp(?u2), where u = X/t2/3, and exhibits slower-than- Gaussian tails ? exp(?|u|4/3) for sufficiently large t and u. Numerical data convincingly demonstrate that in presence of a crowded environment the central Gaussian part and non-Gaussian tails of the distribution persist for both models.
Internacional
Si
JCR del ISI
Si
Título de la revista
New Journal of Physics
ISSN
1367-2630
Factor de impacto JCR
3,539
Información de impacto
Volumen
DOI
Número de revista
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1
Hasta la página
24
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Participantes
  • Autor: Carlos Roberto Mejia Monasterio UPM
  • Autor: Sergei Nechaev Lebedev Physical Institute
  • Autor: Gleb Oshanin Sorbonne Universite
  • Autor: Oleg Vasilyev Institut f¿ur Theoretische Physik
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