{
  "annotation_id": "27beb4d8-1836-4e18-8443-347b3fbb9272",
  "date_created": "2026-03-02T18:02:27.449000Z",
  "date_modified": "2026-03-02T18:02:27.449000Z",
  "file_hash": "eeb988ac6637f4645dd6c2dbcc9aea2713476918a3e4dc462d10ccad662cacdc",
  "private": false,
  "record": {
    "abstract": "We observed continuous-variable entanglement between the bright beams emitted\nabove threshold by an ultrastable optical parametric oscillator, classically\nphase-locked at a frequency difference of 161.8273240(5) MHz. The\namplitude-difference squeezing is -3 dB and the phase-sum one is -1.35 dB.\nBesides proving entanglement in a new physical system, the phase-locked OPO,\nsuch unprecedented frequency-difference stability paves the way for\ntransferring entanglement between different optical frequencies and densely\nimplementing continuous-variable quantum information in the frequency domain.",
    "arxiv_id": "quant-ph/0604134",
    "authors": [
      "Jietai Jing",
      "Sheng Feng",
      "Russell Bloomer",
      "Olivier Pfister"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.74.041804",
    "journal_ref": "PRA 74, 041804(R) (2006)",
    "title": "Experimental continuous-variable entanglement from a   phase-difference-locked optical parametric oscillator",
    "url": "https://arxiv.org/abs/quant-ph/0604134"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "957c7ed8-aa06-40ef-b074-ae333de193e6",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}