{
  "abstract": "Predicting many molecular properties requires accurate ground-state energies of molecular Hamiltonians. Quantum-selected configuration interaction (QSCI) obtains such energies by measuring an input state to select important electronic configurations and classically diagonalizing the Hamiltonian in the subspace they span. ADAPT-QSCI, an adaptive extension of QSCI, improves the input state through iterative circuit growth. For single-reference molecules, the sampling distribution is dominated by the Hartree-Fock (HF) configuration, so most measurements reproduce a configuration already known. We reduce this redundancy by placing the HF configuration in the diagonalization subspace classically, before any measurement. This invalidates the operator-selection criterion of ADAPT-QSCI, and we derive a consistent replacement with energy and gradient in closed form, adding no query to the quantum device. At the per-iteration shot budgets previously used for ADAPT-QSCI, the proposed scheme reaches chemical accuracy with approximately $63\\%$ and $43\\%$ of the CNOT gates for $\\mathrm{H}_4$ and $\\mathrm{H}_6$, and $44\\%$ and $40\\%$ of the total shots. The advantage depends on the budget, however: in the infinite-shot limit the $\\mathrm{H}_4$ CNOT count increases to $125\\%$ of that of ADAPT-QSCI. These results identify the per-iteration shot budget as a key design variable governing resource savings in QSCI-based algorithms.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.03114",
  "author_total": 5,
  "authors": [
    {
      "name": "Ayaka Fujimoto"
    },
    {
      "name": "Norifumi Matsumoto"
    },
    {
      "name": "Shota Kanasugi"
    },
    {
      "name": "Kazunori Maruyama"
    },
    {
      "name": "Hirotaka Oshima"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/b2ss5ty2n0nrv.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.03114",
  "fulltext_url": null,
  "id": "b2ss5ty2n0nrv",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.03114",
  "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 Computing Algorithms and Architecture"
    ]
  ],
  "openalex": "W7220450125",
  "pdf_url": "https://arxiv.org/pdf/2610.03114",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-02",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/b2ss5ty2n0nrv.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:26:45Z",
      "native_id": "2610.03114",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.03114"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:quant-ph",
      "subfield": "quantum"
    }
  ],
  "title": "Circuit growth and subspace read-out in quantum-selected configuration interaction: Separating the Hartree-Fock determinant",
  "title_text": "Circuit growth and subspace read-out in quantum-selected configuration interaction: Separating the Hartree-Fock determinant",
  "type": "preprint",
  "updated_at": "2026-10-30T12:26:45Z",
  "url": "https://research.draconitic.com/paper/b2ss5ty2n0nrv",
  "venue": "arXiv",
  "versions": []
}