{
  "annotation_id": "54fb10f4-ea52-4f39-a2bb-2df81b8c9d06",
  "date_created": "2026-03-02T18:02:17.265000Z",
  "date_modified": "2026-03-02T18:02:17.265000Z",
  "file_hash": "a69f977ef637ef10df6a40dedb65be7816f7092637bda7e99250dc3158007851",
  "private": false,
  "record": {
    "abstract": "In a recent paper (quant-ph/0506105), A S Gupta, M. Gupta and A. Pathak\nproposed a modified Grover algorithm that would exponentially accelerate the\nunsorted database search problem if the number of marked items is known. If\nthis were true, it would represent a major fundamental breakthrough in computer\nscience, mathematics, quantum information and other related branches of\nsciences.\n  However the algorithm is not valid. We will explain it in this brief comment.",
    "arxiv_id": "quant-ph/0506121",
    "authors": [
      "Gui Lu Long"
    ],
    "categories": [
      "quant-ph"
    ],
    "title": "Comment on quant-ph/0506105: The modified Grover algorithm cannot   speedup unsorted database search",
    "url": "https://arxiv.org/abs/quant-ph/0506121"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "325750af-c18c-4341-b4fa-a82b407197da",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}