{
  "annotation_id": "f2f647b7-e94b-40a9-aef1-4f0fe215007f",
  "date_created": "2026-03-02T18:02:07.039000Z",
  "date_modified": "2026-03-02T18:02:07.039000Z",
  "file_hash": "d2f0282778024f624d2f367e5ef1d129933a4997ca7bb6717722b3312c63b042",
  "private": false,
  "record": {
    "abstract": "We present a model to realize a probabilistic conditional sign flip gate\nusing only linear optics. The gate operates in the space of number state qubits\nand is obtained by a nonconventional use of the teleportation protocol. Both a\ndestructive and a nondestructive version of the gate are presented. In the\nformer case an Hadamard gate on the control qubit is combined with a projective\nteleportation scheme mixing control and target. The success probability is 1/2.\nIn the latter case we need a quantum encoder realized via the interaction of\nthe control qubit with an ancillary state composed of two maximally entangled\nphotons. The success probability is 1/4.",
    "arxiv_id": "quant-ph/0404139",
    "authors": [
      "Gian Luca Giorgi",
      "Ferdinando de Pasquale",
      "Simone Paganelli"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.70.022319",
    "journal_ref": "Phys. Rev. A 70, 022319 (2004)",
    "title": "Conditional sign flip via teleportation",
    "url": "https://arxiv.org/abs/quant-ph/0404139"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "4508643f-7a5e-47d4-ba3a-3676966b0a90",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}