{
  "annotation_id": "772ca7b0-64ee-4969-805e-32115f46883a",
  "date_created": "2026-03-02T18:02:03.356000Z",
  "date_modified": "2026-03-02T18:02:03.356000Z",
  "file_hash": "987fd5745efd63b7b6380aa8b8e4ee380b7e9a238ccca425f336db56c1aaad83",
  "private": false,
  "record": {
    "abstract": "The Hughston-Jozsa-Wootters theorem shows that any finite ensemble of quantum\nstates can be prepared \"at a distance\", and it has been used to demonstrate the\ninsecurity of all bit commitment protocols based on finite quantum systems\nwithout superselection rules. In this paper, we prove a generalized HJW theorem\nfor arbitrary ensembles of states on a C*-algebra. We then use this result to\ndemonstrate the insecurity of bit commitment protocols based on infinite\nquantum systems, and quantum systems with Abelian superselection rules.",
    "arxiv_id": "quant-ph/0310001",
    "authors": [
      "Hans Halvorson"
    ],
    "categories": [
      "quant-ph",
      "math-ph",
      "math.MP",
      "math.OA"
    ],
    "doi": "10.1063/1.1812827",
    "journal_ref": "J.Math.Phys. 45 (2004) 4920-4931",
    "title": "Remote preparation of arbitrary ensembles and quantum bit commitment",
    "url": "https://arxiv.org/abs/quant-ph/0310001"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "a34ede0a-032a-423b-ab95-6a06e7755dbc",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}