{
  "annotation_id": "cb5061b2-c202-4c8a-aa72-8c3ac567b1f1",
  "date_created": "2026-03-02T18:02:27.610000Z",
  "date_modified": "2026-03-02T18:02:27.610000Z",
  "file_hash": "9652ea149ef25650f7700b362e89e27fdb94bb08a828a9245629385c1438aef8",
  "private": false,
  "record": {
    "abstract": "We construct a new class of positive indecomposable maps in the algebra of \u0027d\nx d\u0027 complex matrices. Each map is uniquely characterized by a cyclic\nbistochastic matrix. This class generalizes a Choi map for d=3. It provides a\nnew reach family of indecomposable entanglement witnesses which define\nimportant tool for investigating quantum entanglement.",
    "arxiv_id": "quant-ph/0606211",
    "authors": [
      "Dariusz Chruscinski",
      "Andrzej Kossakowski"
    ],
    "categories": [
      "quant-ph",
      "math-ph",
      "math.MP"
    ],
    "journal_ref": "Open Sys. Information Dyn. 14 (2007) 275-294",
    "title": "On the structure of entanglement witnesses and new class of positive   indecomposable maps",
    "url": "https://arxiv.org/abs/quant-ph/0606211"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "d1ffae8a-0f69-4ed0-a412-cc26fe0e4e4e",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}