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First passage and first hitting times of Lévy flights and Lévy walks

New Journal of Physics, ISSN: 1367-2630, Vol: 21, Issue: 10
2019
  • 64
    Citations
  • 0
    Usage
  • 34
    Captures
  • 0
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    64
    • Citation Indexes
      64
  • Captures
    34

Article Description

For both Lévy flight and Lévy walk search processes we analyse the full distribution of first-passage and first-hitting (or first-arrival) times. These are, respectively, the times when the particle moves across a point at some given distance from its initial position for the first time, or when it lands at a given point for the first time. For Lévy motions with their propensity for long relocation events and thus the possibility to jump across a given point in space without actually hitting it ('leapovers'), these two definitions lead to significantly different results. We study the first-passage and first-hitting time distributions as functions of the Lévy stable index, highlighting the different behaviour for the cases when the first absolute moment of the jump length distribution is finite or infinite. In particular we examine the limits of short and long times. Our results will find their application in the mathematical modelling of random search processes as well as computer algorithms.

Bibliographic Details

Vladimir V. Palyulin; George Blackburn; Rainer Klages; Nicholas W. Watkins; Michael A. Lomholt; Ralf Metzler; Aleksei V. Chechkin

IOP Publishing

Physics and Astronomy

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