{
  "abstract": "Photon loss somewhat limits fault-tolerant photonic quantum computing. We investigate its effect on finite-energy Gottesman--Kitaev--Preskill (GKP) states by modeling the pure-loss channel directly. We obtain photon-loss threshold estimates for the surface-GKP code using nearest-lattice-point inner GKP decoding and minimum-weight perfect matching for the outer surface code. For GKP states with $ε=0.01$ and $ε=0.05$, corresponding to GKP squeezing of $20$ and $13\\,\\mathrm{dB}$, the estimated thresholds are $γ^\\ast=5.5\\%$ ($0.24\\,\\mathrm{dB}$) and $γ^\\ast=5.9\\%$ ($0.26\\,\\mathrm{dB}$), respectively. We then introduce an anti-photon-loss inner decoder that compensates for the contraction of the measured quadrature. It increases the corresponding threshold estimates to $γ^\\ast=9.8\\%$ ($0.45\\,\\mathrm{dB}$) and $γ^\\ast=6.3\\%$ ($0.28\\,\\mathrm{dB}$). Our results highlight the importance of accounting for loss-induced lattice contraction in inner decoding and demonstrate that quadrature compensation enhances the photon-loss tolerance of surface-GKP codes for both high- and moderate-quality GKP states, providing a route toward more photon-loss-robust optical quantum computing.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2611.00694",
  "author_total": 10,
  "authors": [
    {
      "name": "Guan-Ju Yan"
    },
    {
      "name": "Pei-Lin Du"
    },
    {
      "name": "Ke-Min Hu"
    },
    {
      "name": "Jun-Jie He"
    },
    {
      "name": "Yu-Ze Zhu"
    },
    {
      "name": "Xing-Yu Chen"
    },
    {
      "name": "Lin Yang"
    },
    {
      "name": "An-Bang Wu"
    },
    {
      "name": "Hao Tang"
    },
    {
      "name": "Xian-Min Jin"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/3pv667d4zzytt.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2611.00694",
  "fulltext_url": null,
  "id": "3pv667d4zzytt",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2611.00694",
  "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/2611.00694",
  "pmcid": null,
  "pmid": null,
  "published": "2026-11-01",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/3pv667d4zzytt.ris",
  "sources": [
    {
      "first_seen": "2026-11-03T12:20:59Z",
      "native_id": "2611.00694",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2611.00694"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:quant-ph",
      "subfield": "quantum"
    }
  ],
  "title": "Photon-loss tolerance of the surface-GKP code with anti-photon-loss decoding",
  "title_text": "Photon-loss tolerance of the surface-GKP code with anti-photon-loss decoding",
  "type": "preprint",
  "updated_at": "2026-11-05T15:20:18Z",
  "url": "https://research.draconitic.com/paper/3pv667d4zzytt",
  "venue": "arXiv",
  "versions": []
}