{
  "annotation_id": "db21a929-4d77-4877-bee8-39077e5f4680",
  "date_created": "2026-03-02T18:01:56.563000Z",
  "date_modified": "2026-03-02T18:01:56.563000Z",
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  "record": {
    "abstract": "We investigate the nonlinear interaction between two photons in a single\ninput pulse at an atomic two level nonlinearity. A one dimensional model for\nthe propagation of light to and from the atom is used to describe the precise\nspatiotemporal coherence of the two photon state. It is shown that the\ninteraction generates spatiotemporal entanglement in the output state similar\nto the entanglement observed in parametric downconversion. A method of\ngenerating photon pairs from coherent pump light using this quantum mechanical\nfour wave mixing process is proposed.",
    "arxiv_id": "quant-ph/0301146",
    "authors": [
      "Holger F. Hofmann",
      "Kunihiro Kojima",
      "Shigeki Takeuchi",
      "Keiji Sasaki"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.68.043813",
    "journal_ref": "Phys. Rev. A 68, 043813 (2003)",
    "title": "Entanglement and four wave mixing effects in the dissipation free   nonlinear interaction of two photons at a single atom",
    "url": "https://arxiv.org/abs/quant-ph/0301146"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "e8b740da-6a92-4ece-98f4-05c68e69e5a6",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}