{
  "abstract": "Squeezed light in the audio-frequency band is a key resource for quantum metrology and quantum sensing. However, realizing stable audio-frequency squeezed light on integrated photonic platforms remains challenging due to technical noise and the difficulty of scalable phase referencing. Here, we demonstrate on-chip generation of audio-band two-mode squeezed states down to 60 Hz in a silica microcavity. To enable phase-stable operation without directly locking fragile quantum modes, we develop a coherent-comb control method in which a weak electro-optic reference comb co-propagates with the vacuum at the quantum frequency modes in an orthogonal polarization. This scheme provides quadrature measurement and long-timescale phase stability, thereby enabling covariance-matrix reconstruction. We verify the entanglement with the positive partial transposition criterion, which confirms inseparability via a minimum symplectic eigenvalue of 0.395 ($<0.5$). Our results establish an experimentally accessible route toward on-chip phase-stable audio-band squeezing and support the scalable framework for continuous-variable quantum information processing with integrated photonics.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": "Journal reference: On-chip squeezed light in the audio frequency band. Science Bulletin 2026, 71(19)",
  "arxiv": "2609.11004",
  "author_total": 10,
  "authors": [
    {
      "name": "Xuezhi Zhu"
    },
    {
      "name": "Yunyun Cao"
    },
    {
      "name": "Rui Liu"
    },
    {
      "name": "Yaya He"
    },
    {
      "name": "Fan Zhang"
    },
    {
      "name": "Yaqing Zhang"
    },
    {
      "name": "Shiwei Du"
    },
    {
      "name": "Meihong Wang"
    },
    {
      "name": "Xiaoshun Jiang"
    },
    {
      "name": "Xiaolong Su"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/4j1yqx4nbsvqr.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.11004",
  "fulltext_url": null,
  "id": "4j1yqx4nbsvqr",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.11004",
  "language": null,
  "licence": "CC-BY-NC-ND-4.0",
  "licence_label": "CC BY-NC-ND 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by-nc-nd/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "physics.optics"
    ],
    [
      "arxiv",
      "quant-ph"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2609.11004",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-10",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/4j1yqx4nbsvqr.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:20:26Z",
      "native_id": "2609.11004",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.11004"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:physics.optics",
      "subfield": "optics-photonics"
    },
    {
      "field": "physics",
      "origin": "arxiv:quant-ph",
      "subfield": "quantum"
    }
  ],
  "title": "On-chip squeezed light in the audio frequency band",
  "title_text": "On-chip squeezed light in the audio frequency band",
  "type": "preprint",
  "updated_at": "2026-10-30T12:20:26Z",
  "url": "https://research.draconitic.com/paper/4j1yqx4nbsvqr",
  "venue": "arXiv",
  "versions": [
    {
      "doi": "10.1016/j.scib.2026.08.054",
      "pid": null,
      "relation": "published-as",
      "title": null,
      "venue": null
    }
  ]
}