{
  "annotation_id": "50f30842-a3c7-4221-9e3d-6bc49b8b7152",
  "date_created": "2026-03-02T18:02:27.223000Z",
  "date_modified": "2026-03-02T18:02:27.223000Z",
  "file_hash": "9962991311fff318468624a5863c44ec62ed7a0a504d16ddaf0ee763a6e2e0f3",
  "private": false,
  "record": {
    "abstract": "We report generation of a continuous-wave squeezed vacuum resonant on the Rb\nD_1 line (795 nm) using periodically poled KTiOPO_4 (PPKTP) crystals. With a\nfrequency doubler and an optical parametric oscillator based on PPKTP crystals,\nwe observed a squeezing level of -2.75 +- 0.14 dB and an anti-squeezing level\nof +7.00 +- 0.13 dB. This system could be utilized for demonstrating storage\nand retrieval of the squeezed vacuum, which is important for the ultra-precise\nmeasurement of atomic spins as well as quantum information processing.",
    "arxiv_id": "quant-ph/0603214",
    "authors": [
      "Takahito Tanimura",
      "Daisuke Akamatsu",
      "Yoshihiko Yokoi",
      "Akira Furusawa",
      "Mikio Kozuma"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1364/OL.31.002344",
    "journal_ref": "Optics Letters 31, 2344 (2006).",
    "title": "Generation of a squeezed vacuum resonant on Rubidium D_1 line with   periodically-poled KTiOPO_4",
    "url": "https://arxiv.org/abs/quant-ph/0603214"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "49e41ba6-d102-4b74-83b9-74d256a1d3f5",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}