{
  "annotation_id": "4e909f87-031d-415b-bbfa-09d9cba92f63",
  "date_created": "2026-03-02T18:01:52.677000Z",
  "date_modified": "2026-03-02T18:01:52.677000Z",
  "file_hash": "544270b21a1ebcbea4a0eb5d090c8dbe75610365cec3bee0da9c84e929083572",
  "private": false,
  "record": {
    "abstract": "This paper has been removed and is superceded by a pair of papers on\nstochastic maps, or channels, which break entanglement (EBT). quant-ph/0302031\nGeneral Entanglement Breaking Channels by Michael Horodecki, Peter W. Shor and\nMary Beth Ruskai includes the results originally in section 3, as well as a\nnumber of new results about the extreme points. (The remarks in previously in\nsection 3 about \"sign change condition\" are incorrect and have been omitted\nfrom quant-ph/0302031.) The new paper contains a to the conjecture that all\nextreme points of EBT maps are CQ when d \u003e 2. quant-ph/0302032 Qubit\nEntanglement Breaking Channels by Mary Beth Ruskai contains the results\noroginally in section 2. The main result is that for qubits, EBT maps are\nprecisely the convex hull of those known as classical-quantum channels. The\ncomplete positivity conditions in a canonical parameterization are reviewed and\nused to formulate EBT constraints.",
    "arxiv_id": "quant-ph/0207100",
    "authors": [
      "Mary Beth Ruskai"
    ],
    "categories": [
      "quant-ph",
      "math-ph",
      "math.MP",
      "math.RA"
    ],
    "title": "Entanglement Breaking Channels",
    "url": "https://arxiv.org/abs/quant-ph/0207100"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "467c52df-e06b-476d-8b53-25d146c4f8c2",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}