{
  "annotation_id": "2a5b6d7e-e14e-44ed-bc02-25efe33a9ce9",
  "date_created": "2026-03-02T18:02:12.437000Z",
  "date_modified": "2026-03-02T18:02:12.437000Z",
  "file_hash": "23b7e173411b82ff79889e2956b587705007645467fc55832fcf7f067aa92d52",
  "private": false,
  "record": {
    "abstract": "We report the successful generation of an entangled multiparticle quantum\nsuperposition of pure photon states. They result from a multiple (universal}\ncloning of a single photon qubit by a high gain, quantum-injected parametric\namplifier. The information preserving property of the process suggests for\nthese states the name of \u0027\u0027multi-particle qubits\u0027\u0027. They are ideal objects for\ninvestigating the emergence of the classical world in quantum systems with\nincreasing complexity, the decoherence processes and may allow the practical\nimplementation of the universal 2-qubit logic gates.",
    "arxiv_id": "quant-ph/0410225",
    "authors": [
      "Francesco De Martini",
      "Fabio Sciarrino"
    ],
    "categories": [
      "quant-ph"
    ],
    "title": "Realization of an Optimally Distinguishable Multi-photon Quantum   Superposition",
    "url": "https://arxiv.org/abs/quant-ph/0410225"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "75b67fe0-4076-4ba7-b2c1-dd7126fb5e31",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}