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<p>Magnon-based quantum state transfer of a qubit is investigated in a one-dimensional Heisenberg model featuring uncorrelated disorder. In the weak coupling regime with respect to the boundaries of the channel, the presence of an anomalous magnon mode with diverging localization length is harnessed to promote high-fidelity state transfer despite the degree of exchange coupling disorder. Under the additional influence of diagonal disorder due to the external magnetic field, we explore ways to optimize the transfer fidelity by navigating through the disordered landscape so as to identify extended states within the channel. Our results are relevant to the design of magnon-based devices for information processing and communication amid the fast-paced progress in the field of magnonics.</p>

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Long-distance quantum state transfer via disorder-robust magnons

  • 期刊论文

  • 发表日期：

    2025年3月21日

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  • W. V. P. de Lima,
  • F. A. B. F. de Moura,
  • D. B. da Fonseca,
  • F. Moraes,
  • A. L. R. Barbosa,
  • G. M. A. Almeida

摘要

Magnon-based quantum state transfer of a qubit is investigated in a one-dimensional Heisenberg model featuring uncorrelated disorder. In the weak coupling regime with respect to the boundaries of the channel, the presence of an anomalous magnon mode with diverging localization length is harnessed to promote high-fidelity state transfer despite the degree of exchange coupling disorder. Under the additional influence of diagonal disorder due to the external magnetic field, we explore ways to optimize the transfer fidelity by navigating through the disordered landscape so as to identify extended states within the channel. Our results are relevant to the design of magnon-based devices for information processing and communication amid the fast-paced progress in the field of magnonics.