{
  "annotation_id": "fe9649d4-a62f-4759-85b0-c881397ea874",
  "date_created": "2026-03-02T18:02:10.298000Z",
  "date_modified": "2026-03-02T18:02:10.298000Z",
  "file_hash": "ad0dd33208a78c176602477891d3fdcc6ffa5d729b2d8ac05a4bff70c57ebaea",
  "private": false,
  "record": {
    "abstract": "A SWAP operation between different types of qubits of single photons is\nessential for manipulating hyperentangled photons for a variety of\napplications. We have implemented an efficient SWAP gate for the momentum and\npolarization degrees of freedom of single photons. The SWAP gate was utilized\nin a single-photon two-qubit quantum logic circuit to deterministically\ntransfer momentum entanglement between a pair of down-converted photons to\npolarization entanglement. The polarization entanglement thus obtained violates\nBell\u0027s inequality by more than 150 standard deviations.",
    "arxiv_id": "quant-ph/0407136",
    "authors": [
      "Marco Fiorentino",
      "Taehyun Kim",
      "Franco N. C. Wong"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.72.012318",
    "title": "Single-photon two-qubit SWAP gate for entanglement manipulation",
    "url": "https://arxiv.org/abs/quant-ph/0407136"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "ccb5d7dd-977b-474a-9dd5-ac23b858d2ad",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}