{
  "annotation_id": "41ba0ea9-059a-4580-96b6-56fb693c7bef",
  "date_created": "2026-03-02T18:01:42.530000Z",
  "date_modified": "2026-03-02T18:01:42.530000Z",
  "file_hash": "a360949466c663337dd0e5ff7a60d3ccd0a031cc8a91906f0466691e4da0c46d",
  "private": false,
  "record": {
    "abstract": "A multiparticle quantum superposition state has been generated by a novel\nphase-selective parametric amplifier of an entangled two-photon state. This\nrealization is expected to open a new field of investigations on the\npersistence of the validity of the standard quantum theory for systems of\nincreasing complexity, in a quasi decoherence-free environment. Because of its\nnonlocal structure the new system is expected to play a relevant role in the\nmodern endeavor on quantum information and in the basic physics of\nentanglement.",
    "arxiv_id": "quant-ph/0011081",
    "authors": [
      "Francesco De Martini",
      "Giovanni Di Giuseppe"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevLett.87.150401",
    "title": "Multiparticle Quantum Superposition and Stimulated Entanglement by   Parity Selective Amplification of Entangled States",
    "url": "https://arxiv.org/abs/quant-ph/0011081"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "b6670ded-4088-461c-afa8-c068d96499cd",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}