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Perfect quantum state transfer through a chaotic spin chain via many-body scars

Shane Dooley*, Luke Johnston, Patrick Gormley, and Beth Campbell

  • *Contact author: dooleysh@gmail.com
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Phys. Rev. B 112, 214304 – Published 1 December, 2025

DOI: https://doi.org/10.1103/hdy9-dr9m

Abstract

Quantum many-body scars (QMBSs) offer a mechanism for weak ergodicity breaking, enabling nonthermal dynamics to persist in a chaotic many-body system. While most studies of QMBS focus on anomalous eigenstate properties or long-lived revivals of local observables, their potential for quantum information processing remains largely unexplored. In this work, we demonstrate that perfect quantum state transfer can be achieved in a strongly interacting, quantum chaotic spin chain by exploiting a sparse set of QMBS eigenstates embedded within an otherwise thermal spectrum. These results show that QMBSs in chaotic many-body systems may be harnessed for information transport tasks typically associated with integrable models.

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Phys. Rev. B 112, 214304– Published 1 December, 2025
  • Received 9 July 2025
  • Revised 10 October 2025
  • Accepted 4 November 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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