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  • Letter

Proxitaxis: An adaptive search strategy based on proximity and stochastic resetting

Giuseppe Del Vecchio Del Vecchio1,*, Manas Kulkarni2,†, Satya N. Majumdar1,‡, and Sanjib Sabhapandit3,§

  • *Contact author: giuseppe.del-vecchio-del-vecchio@universite-paris-saclay.fr
  • †Contact author: manas.kulkarni@icts.res.in
  • ‡Contact author: satya.majumdar@universite-paris-saclay.fr
  • §Contact author: sanjib@rri.res.in

Phys. Rev. E 113, L042101 – Published 2 April, 2026

DOI: https://doi.org/10.1103/bjl2-kmrt

Abstract

We introduce proxitaxis, a simple search strategy where the searcher has only information about the distance from the target but not the direction. The strategy consists of three crucial components: (i) local adaptive moves with a distance-dependent diffusion coefficient, (ii) intermittent long-range returns via stochastic resetting to a certain location R⃗0, and (iii) an inspection move where the searcher dynamically updates the resetting position R⃗0. We compute analytically the capture probability of the target within this strategy and show that it can be maximized by an optimal choice of the control parameters of this strategy. Moreover, the optimal strategy undergoes multiple phase transitions as a function of the control parameters. These phase transitions are generic and occur in all dimensions.

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