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  • Open Access

Multiscale energy spreading in hard-particle chains

Arkady Pikovsky*

  • Department of Physics and Astronomy, University of Potsdam, Karl-Liebknecht-Str. 24/25, 14476 Potsdam-Golm, Germany

  • *Contact author: pikovsky@uni-potsdam.de
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Phys. Rev. E 112, 014123 – Published 23 July, 2025

DOI: https://doi.org/10.1103/ddjx-d1dv

Abstract

We consider a one-dimensional array of particles interacting via an infinite well potential. We explore the properties of energy spreading from an initial state where only a group of particles has nonzero velocities, while others are at rest. We characterize anomalous diffusion of the active domain via moments and entropies of the energy distribution. Only in the special cases of a single-well potential (hard-particle gas) and when the distance between particles is half the potential width, does diffusion exhibit a single scale; otherwise, multiscale anomalous diffusion is observed.

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Phys. Rev. E 112, 014123– Published 23 July, 2025
  • Received 5 April 2025
  • Accepted 7 July 2025
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Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

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