{
  "abstract": "High-harmonic generation (HHG) is a prototypical strong-field process in which intense light drives matter to emit radiation at integer multiples of the driving frequency. Extending HHG into the quantum-optical regime offers new opportunities to probe and control strongly nonlinear light-matter interactions using nonclassical states of light. Yet describing this regime requires a fully quantum treatment of the correlated electron-photon dynamics, which becomes computationally challenging for broadband, strongly squeezed fields. Here we solve the quantum-electrodynamical dynamics of a two-level system driven by bright squeezed vacuum in a converged multimode Hilbert space. Both the driving field and emitted harmonics are fully quantized, with the light-matter interaction treated nonperturbatively. This enables direct access to the multimode quantum state and its higher-order correlations beyond semiclassical sampling or perturbative descriptions. We show that squeezed-vacuum driving produces harmonic emission with qualitatively distinct second- and third-order photon correlations compared with coherent excitation. Moreover, back-action from the driven emitter strongly reshapes the incident squeezed field, generating pronounced Wigner-function negativities that evolve on attosecond timescales. Our results establish a fully quantum framework for broadband strong-field dynamics with squeezed light and provide a route to predicting and interpreting quantum-HHG experiments and their extension to more complex emitters.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.20559",
  "author_total": 5,
  "authors": [
    {
      "name": "Sebastián de-la-Peña"
    },
    {
      "name": "Heiko Appel"
    },
    {
      "name": "Marcelo F. Ciappina"
    },
    {
      "name": "Ofer Neufeld"
    },
    {
      "name": "Angel Rubio"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/74zxc6v1q8wde.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.20559",
  "fulltext_url": null,
  "id": "74zxc6v1q8wde",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.20559",
  "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",
      "physics.optics"
    ],
    [
      "arxiv",
      "quant-ph"
    ],
    [
      "openalex",
      "3107|Laser-Matter Interactions and Applications"
    ]
  ],
  "openalex": "W7213602862",
  "pdf_url": "https://arxiv.org/pdf/2609.20559",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-17",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/74zxc6v1q8wde.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:22:19Z",
      "native_id": "2609.20559",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.20559"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:physics.optics",
      "subfield": "optics-photonics"
    },
    {
      "field": "physics",
      "origin": "arxiv:quant-ph",
      "subfield": "quantum"
    }
  ],
  "title": "High-order correlations and ultrafast Wigner negativities in bright-squeezed-vacuum-driven high-harmonic generation",
  "title_text": "High-order correlations and ultrafast Wigner negativities in bright-squeezed-vacuum-driven high-harmonic generation",
  "type": "preprint",
  "updated_at": "2026-10-30T12:22:19Z",
  "url": "https://research.draconitic.com/paper/74zxc6v1q8wde",
  "venue": "arXiv",
  "versions": []
}