{
  "annotation_id": "b2c2a91c-64ec-4648-872f-d240fe65dce1",
  "date_created": "2026-03-02T18:02:45.124000Z",
  "date_modified": "2026-03-02T18:02:45.124000Z",
  "file_hash": "05e585bad5b81d7f03ab6a8082ab88e23d1dde6c94d892fc705926a84101d0ba",
  "private": false,
  "record": {
    "abstract": "The usual, \"static\" version of the quantum Zeno effect consists in the\nhindrance of the evolution of a quantum systems due to repeated measurements.\nThere is however a \"dynamic\" version of the same phenomenon, first discussed by\nvon Neumann in 1932 and subsequently explored by Aharonov and Anandan, in which\na system is forced to follow a given trajectory. A Berry phase appears if such\na trajectory is a closed loop in the projective Hilbert space. A specific\nexample involving neutron spin is considered and a similar situation with\nphoton polarization is investigated.",
    "arxiv_id": "quant-ph/9904082",
    "authors": [
      "P. Facchi",
      "S. Pascazio"
    ],
    "categories": [
      "quant-ph"
    ],
    "journal_ref": "Acta Phys.Slov. 49 (1999) 671-676",
    "title": "Berry phase due to quantum measurements",
    "url": "https://arxiv.org/abs/quant-ph/9904082"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "da2a507a-3c53-4f14-89db-36c8ad50f6ec",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}