{
  "annotation_id": "99c71843-c279-4358-b4ee-4a36a8f4e32f",
  "date_created": "2026-03-02T18:01:52.092000Z",
  "date_modified": "2026-03-02T18:01:52.092000Z",
  "file_hash": "5854b7ee60337f7f7c8d06c39e9fc9bac4e5e631d7b748fccfa5505ba0a27dcd",
  "private": false,
  "record": {
    "abstract": "The state that an observer attributes to a quantum system depends on the\ninformation available to that observer. If two or more observers have different\ninformation about a single system, they will in general assign different\nstates. Is there any restriction on what states can be assigned, given\nreasonable assumptions about how the observers use their information? We derive\nnecessary and sufficient conditions for a group of general density matrices to\ncharacterize what different people may know about one and the same physical\nsystem. These conditions are summarized by a single criterion, which we term\ncompatibility.",
    "arxiv_id": "quant-ph/0208088",
    "authors": [
      "Todd A. Brun"
    ],
    "categories": [
      "quant-ph"
    ],
    "title": "How much state assignments can differ",
    "url": "https://arxiv.org/abs/quant-ph/0208088"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "fbe3cf97-cc86-4c8b-a52c-ec137c3a1ab1",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}