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- W1971855863 abstract "The Fractional Langevin Equation (FLE) describes a non-Markovian Generalized Brownian Motion with long time persistence (superdiffusion), or anti-persistence (subdiffusion) of both velocity-velocity correlations, and position increments. It presents a case of the Generalized Langevin Equation (GLE) with a singular power law memory kernel. We propose and numerically realize a numerically efficient and reliable Markovian embedding of this superdiffusive GLE, which accurately approximates the FLE over many, about r=N lg b-2, time decades, where N denotes the number of exponentials used to approximate the power law kernel, and b>1 is a scaling parameter for the hierarchy of relaxation constants leading to this power law. Besides its relation to the FLE, our approach presents an independent and very flexible route to model anomalous diffusion. Studying such a superdiffusion in tilted washboard potentials, we demonstrate the phenomenon of transient hyperdiffusion which emerges due to transient kinetic heating effects." @default.
- W1971855863 created "2016-06-24" @default.
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- W1971855863 date "2011-01-01" @default.
- W1971855863 modified "2023-10-13" @default.
- W1971855863 title "Markovian embedding of fractional superdiffusion" @default.
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- W1971855863 doi "https://doi.org/10.1209/0295-5075/93/20002" @default.
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