{
  "annotation_id": "9aed0887-999a-4ef5-a4a4-44790ab23467",
  "date_created": "2026-03-02T18:02:06.498000Z",
  "date_modified": "2026-03-02T18:02:06.498000Z",
  "file_hash": "6a26ccfd42c7d5f6275d4fbc0bb2ca9fca6cdce6791ace703807b5d81657b39f",
  "private": false,
  "record": {
    "abstract": "When a photon with well-defined polarization and momentum passes through a\nfocusing device, these properties are no longer well defined. Their loss is\ncaptured by describing polarization by a 3x3 effective density matrix. Here we\nshow that the effective density matrix corresponds to the actual photodetection\nmodel and we provide a simple formula to calculate it in terms of classical\nfields. Moreover, we explore several possible experimental consequences of the\n\"longitudinal\" term: limits on single-photon detection efficiency,\npolarization-dependent atomic transitions rates and the implications on quantum\ninformation processing.",
    "arxiv_id": "quant-ph/0403029",
    "authors": [
      "Netanel H. Lindner",
      "Daniel R. Terno"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1080/09500340512331327570",
    "journal_ref": "J. Mod. Opt. 52 (8) 1177-1188 (2005)",
    "title": "The effect of focusing on polarization qubits",
    "url": "https://arxiv.org/abs/quant-ph/0403029"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "3dd77039-dd8c-4836-ad97-f35652509507",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}