{
  "abstract": "Bosonic quantum error correction (QEC) offers a hardware-efficient route to fault-tolerant quantum computing. To date, however, superconducting circuit implementations of bosonic codes have utilized centimeter-scale 3D microwave cavities controlled by fixed-frequency transmon qubits, with logical lifetimes limited by transmon bit-flip errors. Here, we realize bosonic QEC in a fully planar architecture by pairing a heavy fluxonium, whose $451 \\pm 70~μ\\mathrm{s}$ bit-flip lifetime exceeds that of any control qubit in previous demonstrations, with an on-chip Archimedean spiral resonator several orders of magnitude smaller in mode volume than prior 3D cavities. We prepare finite-energy Gottesman-Kitaev-Preskill (GKP) states and stabilize them using measurement-free error correction with rapid fluxonium reset, extending the logical lifetime by a factor of $1.59 \\pm 0.05$. These results provide the first demonstration of resonator control using a weakly coupled fluxonium and, with it, the first realization of standalone bosonic QEC in a fully planar superconducting circuit architecture.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.26880",
  "author_total": 25,
  "authors": [
    {
      "name": "Shantanu R. Jha"
    },
    {
      "name": "Shoumik D. Chowdhury"
    },
    {
      "name": "Gabriele Rolleri"
    },
    {
      "name": "Anaida Ali"
    },
    {
      "name": "Lev-Arcady Sellem"
    },
    {
      "name": "Réouven Assouly"
    },
    {
      "name": "David Pahl"
    },
    {
      "name": "Lukas Pahl"
    },
    {
      "name": "Junyoung An"
    },
    {
      "name": "Farid Hassani"
    },
    {
      "name": "Hung-Yu Tsao"
    },
    {
      "name": "Chia-Chin Tsai"
    },
    {
      "name": "Aranya Goswami"
    },
    {
      "name": "Gabriel D. Cutter"
    },
    {
      "name": "Jeremie Boudreault"
    },
    {
      "name": "Jeffrey M. Gertler"
    },
    {
      "name": "Michael A. Gingras"
    },
    {
      "name": "Bethany M. Niedzielski"
    },
    {
      "name": "Jeffrey M. Knecht"
    },
    {
      "name": "Mollie E. Schwartz"
    },
    {
      "name": "Kyle Serniak"
    },
    {
      "name": "Jeffrey A. Grover"
    },
    {
      "name": "Baptiste Royer"
    },
    {
      "name": "Max Hays"
    },
    {
      "name": "William D. Oliver"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/bqkq18z59hgy8.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.26880",
  "fulltext_url": null,
  "id": "bqkq18z59hgy8",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.26880",
  "language": null,
  "licence": "LicenseRef-arXiv-nonexclusive-1.0",
  "licence_label": "arXiv licence",
  "licence_source": "article",
  "licence_url": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "quant-ph"
    ],
    [
      "openalex",
      "1702|Quantum Information and Cryptography"
    ]
  ],
  "openalex": "W7214187073",
  "pdf_url": "https://arxiv.org/pdf/2609.26880",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-30",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/bqkq18z59hgy8.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:25:48Z",
      "native_id": "2609.26880",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.26880"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:quant-ph",
      "subfield": "quantum"
    }
  ],
  "title": "Bosonic Error Correction with Fluxonium",
  "title_text": "Bosonic Error Correction with Fluxonium",
  "type": "preprint",
  "updated_at": "2026-10-30T12:25:48Z",
  "url": "https://research.draconitic.com/paper/bqkq18z59hgy8",
  "venue": "arXiv",
  "versions": []
}