{
  "annotation_id": "2ac248d5-7190-4131-8890-31f446b7a465",
  "date_created": "2026-03-02T18:02:44.402000Z",
  "date_modified": "2026-03-02T18:02:44.402000Z",
  "file_hash": "41445f56f148eb0fb59a37423b2b348fa4b436f1f010666940d9df42f67cf07f",
  "private": false,
  "record": {
    "abstract": "In nonrelativistic quantum mechanics the wave-function of a free particle\nwhich initially is in a finite volume immediately spreads to infinity. In a\nnonrelativistic theory this is of no concern, but we show that the same\ninstantaneous spreading can occur in relativistic quantum theory and that\ntransition probabilities in widely separated systems may instantaneously become\nnonzero. We discuss how this affects Einstein causality.",
    "arxiv_id": "quant-ph/9809030",
    "authors": [
      "Gerhard C. Hegerfeldt"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1002/(SICI)1521-3889(199812)7:7/8\u003c716::AID-ANDP716\u003e3.0.CO;2-T",
    "journal_ref": "Annalen Phys.7:716-725,1998",
    "title": "Instantaneous Spreading and Einstein Causality in Quantum Theory",
    "url": "https://arxiv.org/abs/quant-ph/9809030"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "4a4e4f1b-a0b9-46d0-aff8-97b3aa5aaafa",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}