{
  "annotation_id": "9eb99e36-4fe5-4f12-9581-9275afba6c3f",
  "date_created": "2026-03-02T18:01:42.694000Z",
  "date_modified": "2026-03-02T18:01:42.694000Z",
  "file_hash": "137973ce8bad00354515b21398c9c85ef6334e1689e08d3f1e47e194afcb83be",
  "private": false,
  "record": {
    "abstract": "We ask what type of mixed quantum states can arise when a number of separated\nparties start by sharing a pure quantum state and then this pure state becomes\ncontaminated by noise. We show that not all mixed states arise in this way.\nThis is even the case if the separated parties actively try to degrade their\ninitial pure state by arbitrary local actions and classical communication.",
    "arxiv_id": "quant-ph/0104065",
    "authors": [
      "L. Henderson",
      "N. Linden",
      "S. Popescu"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevLett.87.237901",
    "title": "Are all noisy quantum states obtained from pure ones?",
    "url": "https://arxiv.org/abs/quant-ph/0104065"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "5792bec5-4547-45ef-8579-81b7de20f9db",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}