{
  "annotation_id": "c7a048fa-0acf-42d9-9f3b-a4338bb41263",
  "date_created": "2026-03-02T18:02:19.893000Z",
  "date_modified": "2026-03-02T18:02:19.893000Z",
  "file_hash": "55ec02a4b430c9bbf7246d3ade352f1d4365210d16b44f36f7c2579592c011b7",
  "private": false,
  "record": {
    "abstract": "We report the realization of an entangled quantum superposition of M=12\nphotons by a high gain, quantum-injected optical parametric amplification. The\nsystem is found so highly resilient against decoherence to exhibit directly\naccessible mesoscopic interference effects at normal temperature. By modern\ntomographic methods the non-separability and the quantum superposition are\ndemonstrated for the overall mesoscopic output state of the dynamic \u0027\u0027closed\nsystem\u0027\u0027. The device realizes the condition conceived by Erwin Schroedinger\nwith his 1935 paradigmatic \u0027\u0027Cat\u0027\u0027 apologue, a fundamental landmark in quantum\nmechanics.",
    "arxiv_id": "quant-ph/0508196",
    "authors": [
      "Francesco De Martini",
      "Fabio Sciarrino",
      "Veronica Secondi"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevLett.95.240401",
    "journal_ref": "Phys. Rev. Lett. 95, 240401 (2005)",
    "title": "Realization of a Decoherence-free, Optimally Distinguishable Mesoscopic   Quantum Superposition",
    "url": "https://arxiv.org/abs/quant-ph/0508196"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "41a3c1b0-4378-4ecc-8434-e61bc77c1eae",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}