{
  "abstract": "States with negative Wigner functions constitute a fundamental nonclassical resource underlying quantum advantage. However, their experimental certification typically relies on reconstructing the full phase-space distribution, resulting in a prohibitive measurement overhead for arbitrary quantum states. In this letter, we overcome this limitation by introducing Wigner moments, a family of global phase-space quantities that admit an exact multicopy realization as parity expectation values, and are therefore directly measurable from only a modest number of state copies. This operational correspondence enables systematic hierarchies of detection criteria together with experimentally accessible lower bounds on the logarithmic Wigner negativity, and constitutes a genuine measure of nonclassicality. Numerical benchmarking of our protocol reveals a substantial reduction in copy budget relative to conventional Wigner tomography, establishing Wigner moments as an efficient framework for certifying continuous-variable quantum resources such as genuine multipartite entanglement.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2606.26084",
  "author_total": 4,
  "authors": [
    {
      "name": "Sudip Chakrabarty"
    },
    {
      "name": "Bivas Mallick"
    },
    {
      "name": "Ananda G. Maity"
    },
    {
      "name": "A. S. Majumdar"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/d502rx0thtygn.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2606.26084",
  "fulltext_url": null,
  "id": "d502rx0thtygn",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2606.26084",
  "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",
      "1702|Quantum Information and Cryptography"
    ]
  ],
  "openalex": "W7165969233",
  "pdf_url": "https://arxiv.org/pdf/2606.26084",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-09",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/d502rx0thtygn.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:20:12Z",
      "native_id": "2606.26084",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2606.26084"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:quant-ph",
      "subfield": "quantum"
    }
  ],
  "title": "Operational certification of nonclassicality in arbitrary quantum states from few copies",
  "title_text": "Operational certification of nonclassicality in arbitrary quantum states from few copies",
  "type": "preprint",
  "updated_at": "2026-10-30T12:20:12Z",
  "url": "https://research.draconitic.com/paper/d502rx0thtygn",
  "venue": "arXiv",
  "versions": []
}