{
  "annotation_id": "78782af6-b855-4b9c-aa29-84cfd0bc7e19",
  "date_created": "2026-02-17T05:53:04.258000Z",
  "date_modified": "2026-02-17T05:53:04.258000Z",
  "file_hash": "720c0b16378b49a2fd118da1a4dc53ead5b608589f63a2ef512ebfb20840b15b",
  "private": false,
  "record": {
    "abstract": "We observe time-correlated four photons within a correlation window of 20ns from spontaneous four-wave mixing via a double-Lambda scheme in a cold cloud of Rb-87 atoms. In contrast to high-power pulsed pumping of chi^(2) nonlinear processes in crystals, our scheme generates correlated four-photon states by direct continuous-wave pumping at nominal powers. We verify the presence of genuinely correlated four-photon states over accidentals by higher-order intensity cross-correlation measurements and accidental subtraction. We infer a time-correlated four-photon generation rate of 2.5(4)x10^6 counts per second close to saturation. The photons produced are near-resonant with atomic transitions, and have a bandwidth in the order of MHz, making them readily compatible with quantum networking applications involving atoms.",
    "arxiv_id": "2601.05558",
    "authors": [
      "Yifan Li",
      "Justin Yu Xiang Peh",
      "Chang Hoong Chow",
      "Boon Long Ng",
      "Vindhiya Prakash",
      "Christian Kurtsiefer"
    ],
    "categories": [
      "quant-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "title": "Narrowband four-photon states from spontaneous four-wave mixing",
    "url": "https://arxiv.org/abs/2601.05558",
    "version": "v1"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "0cfd0e09-3091-482f-a88e-2490deaa815c",
    "id": "arXiv Dataset",
    "type": "Model",
    "variant": "snapshot-2026-01-17",
    "version": "0.1.0"
  },
  "user_id": 1000002
}