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  • Letter
  • Open Access

Maximal dispersion of adaptive random walks

Gabriele Di Bona1, Leonardo Di Gaetano2, Vito Latora1,3,4, and Francesco Coghi5,*

  • 1School of Mathematical Sciences, Queen Mary University of London, London E1 4NS, England
  • 2Department of Network and Data Science, Central European University, 1100 Vienna, Austria
  • 3Dipartimento di Fisica ed Astronomia, Università di Catania and INFN, I-95123 Catania, Italy
  • 4Complexity Science Hub Vienna (CSHV), Josefstädter Straße 39, 1080 Vienna, Austria
  • 5Nordita, KTH Royal Institute of Technology and Stockholm University, Hannes Alfvéns väg 12, SE-106 91 Stockholm, Sweden

  • *francesco.coghi@su.se

Phys. Rev. Research 4, L042051 – Published 30 December, 2022

DOI: https://doi.org/10.1103/PhysRevResearch.4.L042051

Abstract

Maximum entropy random walks (MERWs) are maximally dispersing and play a key role in optimizing information spreading in various contexts. However, building MERWs comes at the cost of knowing beforehand the global structure of the network, a requirement that makes them totally inadequate in real-case scenarios. Here, we propose an adaptive random walk (ARW), which instead maximizes dispersion by updating its transition rule on the local information collected while exploring the network. We show how to derive ARW via a large-deviation representation of MERW and study its dynamics on synthetic and real-world networks.

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