{
  "abstract": "Quantum low-density parity check (QLDPC) codes may lead to order-of-magnitude reductions in the qubit overhead required for fault-tolerant quantum computation. Achieving this improved overhead requires logical operations that selectively address individual logical qubits encoded within multi-qubit code blocks. Recently proposed architectures achieve this through QLDPC surgery, in which non-destructive Pauli measurements are performed using ancillary ''gadget'' systems transiently entangled with the code block, generalising lattice surgery. Here we implement QLDPC surgery on a [[10,2,3]] generalised bicycle code using Quantinuum's H2-2 trapped ion processor. A single-round surgery measurement using seven gadget qubits measures the $\\bar{X}_1$ operator with a 0.72 [0.32, 1.41]% (95% credible interval) error rate and agrees with subsequent transversal measurement with 1.03 [0.60, 1.65]% error. Decoding across three rounds of syndrome extraction suppresses the gadget measurement error, reducing the error rate to below 0.26%. The syndrome after surgery confirms return to the code space and the unaddressed ''spectator'' qubit is preserved with error 0.21 [0.04, 0.67]% during the three-round measurement. We further demonstrate composition of conjugate basis gadgets by sequentially measuring $\\bar{X}_1$ then $\\bar{Z}_2$, reusing the gadget qubits, and obtain a 1.12 [0.60, 1.94]% error in the $\\bar{Z}_2$ measurement. These results constitute a hardware validation of the generalised surgery primitive underlying Pauli-based computing for QLDPC architectures.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.39067",
  "author_total": 2,
  "authors": [
    {
      "name": "Surabhi Luthra"
    },
    {
      "name": "Alex Owens"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/eajk473kx4g5y.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.39067",
  "fulltext_url": null,
  "id": "eajk473kx4g5y",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.39067",
  "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",
      "quant-ph"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2610.39067",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-28",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/eajk473kx4g5y.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:36:23Z",
      "native_id": "2610.39067",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.39067"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:quant-ph",
      "subfield": "quantum"
    }
  ],
  "title": "Individually Addressed Logical Pauli Measurements by QLDPC Surgery on a Trapped Ion Quantum Computer",
  "title_text": "Individually Addressed Logical Pauli Measurements by QLDPC Surgery on a Trapped Ion Quantum Computer",
  "type": "preprint",
  "updated_at": "2026-11-01T12:20:45Z",
  "url": "https://research.draconitic.com/paper/eajk473kx4g5y",
  "venue": "arXiv",
  "versions": []
}