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- W2064635243 abstract "A discrete-time dynamics of a non-Markovian random walker is analyzed using a minimal model where memory of the past drives the present dynamics. In recent work [N. Kumar et al., Phys. Rev. E 82, 021101 (2010)] we proposed a model that exhibits asymptotic superdiffusion, normal diffusion, and subdiffusion with the sweep of a single parameter. Here we propose an even simpler model, with minimal options for the walker: either move forward or stay at rest. We show that this model can also give rise to diffusive, subdiffusive, and superdiffusive dynamics at long times as a single parameter is varied. We show that in order to have subdiffusive dynamics, the memory of the rest states must be perfectly correlated with the present dynamics. We show explicitly that if this condition is not satisfied in a unidirectional walk, the dynamics is only either diffusive or superdiffusive (but not subdiffusive) at long times." @default.
- W2064635243 created "2016-06-24" @default.
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- W2064635243 date "2014-08-27" @default.
- W2064635243 modified "2023-10-12" @default.
- W2064635243 title "Memory-induced anomalous dynamics in a minimal random walk model" @default.
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- W2064635243 doi "https://doi.org/10.1103/physreve.90.022136" @default.
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