{
  "abstract": "We address the problem of extracting a target eigenstate from an approximate pure state. Our approach, symmetry-orbit decoupling, exploits symmetries that preserve the target state while acting differently on the residual. Averaging over the resulting orbit suppresses the target--residual coherence without reducing the target population, thereby exposing a spectral structure that is hidden in the original pure state. When the target is sufficiently separated from the residual modes, it becomes the principal mode of the orbit-averaged state and can be identified through the orbit Gram matrix. Numerical VQE simulations performed with QuESTlink for six- and eight-qubit Heisenberg and Fermi--Hubbard chains show substantial improvements in ground-state energy estimation. The remaining accuracy is limited by residual components that are indistinguishable from the target under the chosen symmetry.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2606.21962",
  "author_total": 4,
  "authors": [
    {
      "name": "Canyu He"
    },
    {
      "name": "Chunhua Zeng"
    },
    {
      "name": "Ruyu Yang"
    },
    {
      "name": "Yongdan Yang"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/353128dwxbmac.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2606.21962",
  "fulltext_url": null,
  "id": "353128dwxbmac",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2606.21962",
  "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": "W7165651555",
  "pdf_url": "https://arxiv.org/pdf/2606.21962",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-16",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/353128dwxbmac.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:30:32Z",
      "native_id": "2606.21962",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2606.21962"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:quant-ph",
      "subfield": "quantum"
    }
  ],
  "title": "Dominant Eigenstate Isolation through Symmetry-Orbit Decoupling",
  "title_text": "Dominant Eigenstate Isolation through Symmetry-Orbit Decoupling",
  "type": "preprint",
  "updated_at": "2026-10-30T12:33:28Z",
  "url": "https://research.draconitic.com/paper/353128dwxbmac",
  "venue": "arXiv",
  "versions": []
}