{
  "annotation_id": "bd6035e9-5760-4c21-9d6a-4253354c32a4",
  "date_created": "2026-03-02T18:01:35.732000Z",
  "date_modified": "2026-03-02T18:01:35.732000Z",
  "file_hash": "45d686556ce4a671d1427bd72fd6133f3ce2046fc0c876675f706046499255c4",
  "private": false,
  "record": {
    "abstract": "We study a limited set of optical circuits for creating near maximal\npolarisation entanglement {\\em without} the usual large vacuum contribution.\n  The optical circuits we consider involve passive interferometers,\nfeed-forward detection, down-converters and squeezers. For input vacuum fields\nwe find that the creation of maximal entanglement using such circuits is\nimpossible when conditioned on two detected auxiliary photons. So far, there\nhave been no experiments with more auxiliary photons. Thus, based on the\nminimum complexity of the circuits required, if near maximal polarisation\nentanglement is possible it seems unlikely that it will be implemented\nexperimentally with the current resources.",
    "arxiv_id": "quant-ph/0001080",
    "authors": [
      "Pieter Kok",
      "Samuel L Braunstein"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.62.064301",
    "journal_ref": "Phys. Rev. A 62, 064301 (2000)",
    "title": "Limitations on the Creation of Maximal Entanglement",
    "url": "https://arxiv.org/abs/quant-ph/0001080"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "9396dada-bda4-4a5e-9a9b-8aab600ded1c",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}