{
  "annotation_id": "be1e9e63-f4e6-4325-8533-ee64ab769a04",
  "date_created": "2026-03-02T18:01:56.501000Z",
  "date_modified": "2026-03-02T18:01:56.501000Z",
  "file_hash": "c140f3af1441cd23dfaa98dd3d21ad6a7cd4544b8697f99f67879dd923a740d8",
  "private": false,
  "record": {
    "abstract": "We present a protocol for performing entanglement swapping with intense\npulsed beams. In a first step, the generation of amplitude correlations between\ntwo systems that have never interacted directly is demonstrated. This is\nverified in direct detection with electronic modulation of the detected\nphotocurrents. The measured correlations are better than expected from a\nclassical reconstruction scheme. In the entanglement swapping process, a\nfour--partite entangled state is generated. We prove experimentally that the\namplitudes of the four optical modes are quantum correlated 3 dB below shot\nnoise, which is due to the potential four--party entanglement.",
    "arxiv_id": "quant-ph/0302068",
    "authors": [
      "Oliver Gl\u00f6ckl",
      "Stefan Lorenz",
      "Christoph Marquardt",
      "Joel Heersink",
      "Michel Brownnutt",
      "Christine Silberhorn",
      "Qing Pan",
      "Peter van Loock",
      "Natalia Korolkova",
      "Gerd Leuchs"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.68.012319",
    "journal_ref": "Phys. Rev. A 68, 012319 (2003)",
    "title": "Experiment towards continuous-variable entanglement swapping: Highly   correlated four-partite quantum state",
    "url": "https://arxiv.org/abs/quant-ph/0302068"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "ff91fa75-636e-4719-8424-2b72b082af1c",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}