The statistics of Rayleigh-Levy flight extrema - CEA - Université Paris-Saclay
Journal Articles Astronomy and Astrophysics - A&A Year : 2024

The statistics of Rayleigh-Levy flight extrema

Abstract

Rayleigh-Levy flights have played a significant role in cosmology as simplified models for understanding how matter distributes itself under gravitational influence. These models also exhibit numerous remarkable properties that enable the prediction of a wide range of characteristics. Here, we derive the one and two point statistics of extreme points within Rayleigh-Levy flights spanning one to three dimensions, stemming directly from fundamental principles. In the context of the mean field limit, we provide straightforward closed-form expressions for Euler counts and their correlations, particularly in relation to their clustering behaviour over long distances. Additionally, quadratures allow for the computation of extreme value number densities. A comparison between theoretical predictions in 1D and Monte Carlo measurements shows remarkable agreement. Given the widespread use of Rayleigh-Levy processes, these comprehensive findings offer significant promise not only in astrophysics but also in broader applications beyond the field.
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hal-04503415 , version 1 (09-09-2024)

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Francis Bernardeau, Christophe Pichon. The statistics of Rayleigh-Levy flight extrema. Astronomy and Astrophysics - A&A, 2024, 689, pp.A105. ⟨10.1051/0004-6361/202449628⟩. ⟨hal-04503415⟩
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