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Modeling of subdiffusion in space-time-dependent force fields beyond the fractional Fokker-Planck equation
Aleksander Weron1, Marcin Magdziarz, Karina Weron
1Hugo Steinhaus Center, Institute of Mathematics and Computer Science, Wroclaw University of Technology, Wroclaw, Poland. aleksander.weron@pwr.wroc.pl
Abstract:
In this paper we attack the challenging problem of modeling subdiffusion with an arbitrary space-time-dependent driving. Our method is based on a combination of the Langevin-type dynamics with subordination techniques. For the case of a purely time-dependent force, we recover the death of linear response and field-induced dispersion -- two significant physical properties well-known from the studies based on the fractional Fokker-Planck equation. However, our approach allows us to study subdiffusive dynamics without referring to this equation.
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