Yukawa potential, panharmonic measure and Brownian motion

Research output: Contribution to journalArticleScientificpeer-review


  • Antti Rasila
  • Tommi Sottinen

Research units

  • University of Vaasa


This paper continues our earlier investigation, where a walk-on-spheres (WOS) algorithm for Monte Carlo simulation of the solutions of the Yukawa and the Helmholtz partial differential equations (PDEs) was developed by using the Duffin correspondence. In this paper, we investigate the foundations behind the algorithm for the case of the Yukawa PDE. We study the panharmonic measure, which is a generalization of the harmonic measure for the Yukawa PDE. We show that there are natural stochastic definitions for the panharmonic measure in terms of the Brownian motion and that the harmonic and the panharmonic measures are all mutually equivalent. Furthermore, we calculate their Radon-Nikodym derivatives explicitly for some balls, which is a key result behind the WOS algorithm.


Original languageEnglish
Article number28
Pages (from-to)1-13
Issue number2
Publication statusPublished - 1 May 2018
MoE publication typeA1 Journal article-refereed

    Research areas

  • Bessel functions, Brownian motion, Duffin correspondence, Harmonic measure, Monte Carlo simulation, Panharmonic measure, Potential theory, Walk-on-spheres algorithm, Yukawa equation

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