{
  "abstract": "Wigner-negative states of light are key resources for quantum advantage in continuous-variable optical quantum computing. They can be produced probabilistically via frequency conversion and photon detection, or deterministically by exploiting the single-photon nonlinearity of a quantum emitter. Here, we generate such Wigner-negative states of light with a tunable negativity using a single semiconductor quantum dot in a cavity. Optical coherent control of the quantum-dot transition allows to generate a quantum superposition of zero and one photon. The generated quantum states are characterized point-by-point in the phase space through homodyne measurement. The emergence of Wigner-function negativity is observed as the excitation power is increased. After correcting for collection and propagation losses, we obtain fidelities to the ideal state and quantum purities above 95%, together with near-optimal quadrature squeezing. The ability to generate a wide variety of Wigner-negative states with mature semiconductor technology opens promising opportunities for continuous-variable optical quantum technologies.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.36233",
  "author_total": 11,
  "authors": [
    {
      "name": "Hubert Lam"
    },
    {
      "name": "Petr Steindl"
    },
    {
      "name": "Yann Portella"
    },
    {
      "name": "Kiarn T. Laverick"
    },
    {
      "name": "Kian Hwee Lim"
    },
    {
      "name": "Juan R. Alvarez"
    },
    {
      "name": "Aristide Lemaitre"
    },
    {
      "name": "Maria Maffei"
    },
    {
      "name": "Alexia Auffeves"
    },
    {
      "name": "Dario A. Fioretto"
    },
    {
      "name": "Pascale Senellart"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/9wmaznr8e89h9.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.36233",
  "fulltext_url": null,
  "id": "9wmaznr8e89h9",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.36233",
  "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",
      "cond-mat.mes-hall"
    ],
    [
      "arxiv",
      "physics.optics"
    ],
    [
      "arxiv",
      "quant-ph"
    ],
    [
      "openalex",
      "1702|Quantum Information and Cryptography"
    ]
  ],
  "openalex": "W7224097135",
  "pdf_url": "https://arxiv.org/pdf/2610.36233",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-26",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/9wmaznr8e89h9.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:35:50Z",
      "native_id": "2610.36233",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.36233"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.mes-hall",
      "subfield": "condensed-matter"
    },
    {
      "field": "physics",
      "origin": "arxiv:physics.optics",
      "subfield": "optics-photonics"
    },
    {
      "field": "physics",
      "origin": "arxiv:quant-ph",
      "subfield": "quantum"
    }
  ],
  "title": "Generation of quantum light with tunable Wigner negativity with a semiconductor quantum dot",
  "title_text": "Generation of quantum light with tunable Wigner negativity with a semiconductor quantum dot",
  "type": "preprint",
  "updated_at": "2026-10-30T12:35:50Z",
  "url": "https://research.draconitic.com/paper/9wmaznr8e89h9",
  "venue": "arXiv",
  "versions": []
}