{
  "abstract": "Multiphoton subtraction from a traveling squeezed vacuum is a standard route to non-Gaussian optical-state engineering. High state-generation rates call for ultrashort optical pulses driven by high-repetition-rate lasers, but combining higher-order subtraction with ultrashort pulsed light and full state reconstruction remains challenging. Here we demonstrate up to four-photon subtraction from 10-ps squeezed-vacuum wave packets generated by a broadband waveguide optical parametric amplifier. Using a Ti-Au transition-edge sensor for photon-number-resolved heralding and homodyne tomography on the signal mode, we reconstruct the generated states up to the four-photon-subtracted case. The reconstructed states exhibit clear parity-dependent structure and visible Wigner-function negativity without loss correction. These results extend the experimentally accessible regime of multiphoton subtraction in broadband traveling optical modes and establish a platform for non-Gaussian optical resource-state engineering in continuous-variable quantum optics.",
  "abstract_shown": true,
  "affiliations": [
    "RIKEN Center for Quantum Computing",
    "The University of Tokyo",
    "National Institute of Advanced Industrial Science and Technology",
    "AIST-UTokyo Advanced Operando-Measurement Technology Open Innovation Laboratory",
    "NTT",
    "University of Massachusetts Amherst",
    "Palacky University"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 15,
  "authors": [
    {
      "affs": [
        0,
        1
      ],
      "name": "Mamoru Endo",
      "orcid": "0000-0003-4594-6791"
    },
    {
      "affs": [
        1
      ],
      "name": "Takefumi Nomura"
    },
    {
      "affs": [
        1
      ],
      "name": "Tatsuki Sonoyama",
      "orcid": "0000-0002-8055-5625"
    },
    {
      "affs": [
        1
      ],
      "name": "Kazuma Takahashi",
      "orcid": "0009-0003-0630-9228"
    },
    {
      "affs": [
        2
      ],
      "name": "Sachiko Takasu"
    },
    {
      "affs": [
        3,
        2
      ],
      "name": "Daiji Fukuda",
      "orcid": "0000-0003-0555-4320"
    },
    {
      "affs": [
        4
      ],
      "name": "Takahiro Kashiwazaki",
      "orcid": "0000-0002-4601-047X"
    },
    {
      "affs": [
        4
      ],
      "name": "Asuka Inoue",
      "orcid": "0000-0002-6907-4951"
    },
    {
      "affs": [
        4
      ],
      "name": "Takeshi Umeki",
      "orcid": "0000-0002-5787-5911"
    },
    {
      "affs": [
        1,
        5
      ],
      "name": "Rajveer Nehra",
      "orcid": "0000-0002-0165-2188"
    },
    {
      "affs": [
        6
      ],
      "name": "Petr Marek",
      "orcid": "0000-0002-5761-8966"
    },
    {
      "affs": [
        6
      ],
      "name": "Radim Filip",
      "orcid": "0000-0003-4114-6068"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Kan Takase",
      "orcid": "0000-0003-4017-8332"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Warit Asavanant",
      "orcid": "0000-0002-3722-3676"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Akira Furusawa",
      "orcid": "0000-0002-6176-6742"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/4xk4pbj4khddj.bib",
  "cited_by": 27,
  "doi": "10.1103/6tlg-7qgm",
  "fulltext_url": null,
  "id": "4xk4pbj4khddj",
  "issns": [
    "0556-2791",
    "1050-2947",
    "1094-1622",
    "1538-4446",
    "2469-9926",
    "2469-9934",
    "2469-9942"
  ],
  "landing_url": "https://doi.org/10.1103/6tlg-7qgm",
  "language": "en",
  "licence": "CC-BY",
  "licence_label": "CC BY",
  "licence_source": "journal",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "openalex",
      "3107|Quantum Information and Cryptography"
    ]
  ],
  "openalex": "W4407571432",
  "pdf_url": null,
  "pmcid": null,
  "pmid": null,
  "published": "2026-07-13",
  "publisher": "American Physical Society",
  "ris": "https://research.draconitic.com/paper/4xk4pbj4khddj.ris",
  "sources": [
    {
      "first_seen": "2026-11-08T13:20:38Z",
      "native_id": "W4407571432",
      "source": "openalex",
      "url": "https://doi.org/10.1103/6tlg-7qgm"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "openalex:3107|Quantum Information and Cryptography",
      "subfield": "quantum"
    }
  ],
  "title": "Four-photon subtraction from picosecond squeezed vacuum demonstrating Wigner negativity without loss correction",
  "title_text": "Four-photon subtraction from picosecond squeezed vacuum demonstrating Wigner negativity without loss correction",
  "type": "peer-reviewed",
  "updated_at": "2026-11-08T13:20:38Z",
  "url": "https://research.draconitic.com/paper/4xk4pbj4khddj",
  "venue": "Physical Review A",
  "versions": []
}