{
  "annotation_id": "e40c1ce0-0679-40b2-a11e-20ad1b45e709",
  "date_created": "2026-03-02T18:01:48.823000Z",
  "date_modified": "2026-03-02T18:01:48.823000Z",
  "file_hash": "2f55946eac5cc6c2bf2af66a660622ffff3e8bf3c6ef6b2d0681245fd68279ad",
  "private": false,
  "record": {
    "abstract": "We report the experimental realization of a recently discovered quantum\ninformation protocol by Asher Peres implying an apparent non-local quantum\nmechanical retrodiction effect. The demonstration is carried out by applying a\nnovel quantum optical method by which each singlet entangled state is\nphysically implemented by a two-dimensional subspace of Fock states of a mode\nof the electromagnetic field, specifically the space spanned by the vacuum and\nthe one photon state, along lines suggested recently by E. Knill et al., Nature\n409, 46 (2001) and by M. Duan et al., Nature 414, 413 (2001). The successful\nimplementation of the new technique is expected to play an important role in\nmodern quantum information and communication and in EPR quantum non-locality\nstudies.",
    "arxiv_id": "quant-ph/0201019",
    "authors": [
      "Fabio Sciarrino",
      "Egilberto Lombardi",
      "Francesco De Martini"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.66.024309",
    "title": "Delayed - Choice Entanglement - Swapping with Vacuum-One Photon Quantum   States",
    "url": "https://arxiv.org/abs/quant-ph/0201019"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "8b1bed69-fc31-408b-9233-db3afbb27644",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}