{
  "abstract": "We propose multi-spin molecules as a viable architecture for fault-tolerant quantum computing. To this aim, we introduce a correction protocol handling both diagonal and off-diagonal errors, typically associated with dephasing and relaxation. The scheme is based on a hybrid encoding which combines dephasing-tolerant units suppressing the leading pure dephasing error into a multi-spin molecule implementing a multi-qubit code for residual off-diagonal errors. Our proposal leverages peculiar properties of molecular spins, i.e. the strong hierarchy between different errors and the possibility to engineer multi-spin molecules at the synthetic level. Moreover, it addresses the important issue of the loss of coherences in anharmonic systems subject to off-diagonal errors, which hampers their correction at the single spin level. Thanks to the huge suppression of dephasing by the first-level code, we numerically demonstrate the potential performance of this strategy even with a limited number of spins per logical unit.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.03318",
  "author_total": 8,
  "authors": [
    {
      "name": "Matteo Mezzadri"
    },
    {
      "name": "Silvia Macedonio"
    },
    {
      "name": "Luca Lepori"
    },
    {
      "name": "Emilio Macaluso"
    },
    {
      "name": "Francesco Albarelli"
    },
    {
      "name": "Richard E. P. Winpenny"
    },
    {
      "name": "Alessandro Chiesa"
    },
    {
      "name": "Stefano Carretta"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/d04573q1v9xxe.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.03318",
  "fulltext_url": null,
  "id": "d04573q1v9xxe",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.03318",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "cond-mat.mes-hall"
    ],
    [
      "arxiv",
      "cond-mat.mtrl-sci"
    ],
    [
      "arxiv",
      "quant-ph"
    ],
    [
      "openalex",
      "1702|Quantum Computing Algorithms and Architecture"
    ]
  ],
  "openalex": "W7220476433",
  "pdf_url": "https://arxiv.org/pdf/2610.03318",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-07",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/d04573q1v9xxe.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:27:37Z",
      "native_id": "2610.03318",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.03318"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.mes-hall",
      "subfield": "condensed-matter"
    },
    {
      "field": "physics",
      "origin": "arxiv:quant-ph",
      "subfield": "quantum"
    }
  ],
  "title": "Beyond Pure Dephasing: Quantum Error Correction in Single Molecules Requires Multiple Spins",
  "title_text": "Beyond Pure Dephasing: Quantum Error Correction in Single Molecules Requires Multiple Spins",
  "type": "preprint",
  "updated_at": "2026-10-30T12:27:37Z",
  "url": "https://research.draconitic.com/paper/d04573q1v9xxe",
  "venue": "arXiv",
  "versions": []
}