{
  "annotation_id": "49f9af66-a172-40bd-8a82-8096ac514b9b",
  "date_created": "2026-03-02T18:01:53.155000Z",
  "date_modified": "2026-03-02T18:01:53.155000Z",
  "file_hash": "91cc8bafd73d7012dfb44f1910c8f739ee10af5d85d94c60ffaf50059b833e0e",
  "private": false,
  "record": {
    "abstract": "It is argued that the title of this paper represents a misconception.\nContrary to widespread beliefs it is electromagnetic field modes that are\n``systems\u0027\u0027 and can be entangled, not photons. The amount of entanglement in a\ngiven state is shown to depend on redefinitions of the modes; we calculate the\nminimum and maximum over all such redefinitions for several examples.",
    "arxiv_id": "quant-ph/0206135",
    "authors": [
      "S. J. van Enk"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.67.022303",
    "journal_ref": "Phys. Rev. A 67, 022303 (2003)",
    "title": "Entanglement of photons",
    "url": "https://arxiv.org/abs/quant-ph/0206135"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "d3d43621-59c9-4689-930d-9724bbe6bbc8",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}