{
  "annotation_id": "db629a7b-706e-4964-b490-b85513062e07",
  "date_created": "2026-03-02T18:01:56.444000Z",
  "date_modified": "2026-03-02T18:01:56.444000Z",
  "file_hash": "8f57b9abdf26973d31cc58715971faa4ccebf5915ebfaf7a60533a0485717fa5",
  "private": false,
  "record": {
    "abstract": "We exhibit two black-box problems, both of which have an efficient quantum\nalgorithm with zero-error, yet whose composition does not have an efficient\nquantum algorithm with zero-error. This shows that quantum zero-error\nalgorithms cannot be composed. In oracle terms, we give a relativized world\nwhere ZQP^{ZQP}\\=ZQP, while classically we always have ZPP^{ZPP}=ZPP.",
    "arxiv_id": "quant-ph/0211029",
    "authors": [
      "Harry Buhrman",
      "Ronald de Wolf"
    ],
    "categories": [
      "quant-ph",
      "cs.CC"
    ],
    "journal_ref": "Information Processing Letters, 87(2):79-84, 2003",
    "title": "Quantum Zero-Error Algorithms Cannot be Composed",
    "url": "https://arxiv.org/abs/quant-ph/0211029"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "eb90d1af-77d1-4cba-8eb6-1e1051e60abd",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}