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- W4387687296 abstract "We consider the Nonlinear-Cost Random Walk model in discrete time introduced in [Phys. Rev. Lett. 130, 237102 (2023)], where a fee is charged for each jump of the walker. The nonlinear cost function is such that slow/short jumps incur a flat fee, while for fast/long jumps the cost is proportional to the distance covered. In this paper we compute analytically the average and variance of the distance covered in $n$ steps when the total budget $C$ is fixed, as well as the statistics of the number of long/short jumps in a trajectory of length $n$, for the exponential jump distribution. These observables exhibit a very rich and non-monotonic scaling behavior as a function of the variable $C/n$, which is traced back to the makeup of a typical trajectory in terms of long/short jumps, and the resulting entropy thereof. As a byproduct, we compute the asymptotic behavior of ratios of Kummer hypergeometric functions when both the first and last arguments are large. All our analytical results are corroborated by numerical simulations." @default.
- W4387687296 created "2023-10-17" @default.
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- W4387687296 date "2023-10-13" @default.
- W4387687296 modified "2023-10-18" @default.
- W4387687296 title "Nonlinear-Cost Random Walk: exact statistics of the distance covered for fixed budget" @default.
- W4387687296 doi "https://doi.org/10.48550/arxiv.2310.08966" @default.
- W4387687296 hasPublicationYear "2023" @default.
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