{
  "annotation_id": "076ddcc9-8d40-48ee-bbb4-fcb7e4d6258a",
  "date_created": "2026-03-02T18:02:10.437000Z",
  "date_modified": "2026-03-02T18:02:10.437000Z",
  "file_hash": "34333517f00b89c301dee440dc9717b83d6022bfb8e2cb86b5400788bdb1947b",
  "private": false,
  "record": {
    "abstract": "We describe a method to project photonic two-qubit states onto the symmetric\nand antisymmetric subspaces of their Hilbert space. This device utilizes an\nancillary coherent state, together with a weak cross-Kerr non-linearity,\ngenerated, for example, by electromagnetically induced transparency. The\nsymmetry analyzer is non-destructive, and works for small values of the\ncross-Kerr coupling. Furthermore, this device can be used to construct a\nnon-destructive Bell state detector.",
    "arxiv_id": "quant-ph/0408117",
    "authors": [
      "S. D. Barrett",
      "P. Kok",
      "K. Nemoto",
      "R. G. Beausoleil",
      "W. J. Munro",
      "T. P. Spiller"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.71.060302",
    "journal_ref": "Phys. Rev. A 71, 060302 (2005)",
    "title": "A symmetry analyser for non-destructive Bell state detection using EIT",
    "url": "https://arxiv.org/abs/quant-ph/0408117"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "6debd914-33d7-417a-afb9-e57a445077da",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}