{
  "annotation_id": "4294f1a5-4a1a-4856-8f55-b96131cf8a82",
  "date_created": "2026-03-02T18:02:45.187000Z",
  "date_modified": "2026-03-02T18:02:45.187000Z",
  "file_hash": "8441c2c492e633c496e54aaa79efcc8c0afeee5463b974aca67f162cec534e8d",
  "private": false,
  "record": {
    "abstract": "Using nuclear magnetic resonance techniques, we experimentally investigated\nthe effects of applying a two bit phase error detection code to preserve\nquantum information in nuclear spin systems. Input states were stored with and\nwithout coding, and the resulting output states were compared with the\noriginals and with each other. The theoretically expected result, net reduction\nof distortion and conditional error probabilities to second order, was indeed\nobserved, despite imperfect coding operations which increased the error\nprobabilities by approximately 5%. Systematic study of the deviations from the\nideal behavior provided quantitative measures of different sources of error,\nand good agreement was found with a numerical model. Theoretical questions in\nquantum error correction in bulk nuclear spin systems including fidelity\nmeasures, signal strength and syndrome measurements are discussed.",
    "arxiv_id": "quant-ph/9811068",
    "authors": [
      "Debbie Leung",
      "Lieven Vandersypen",
      "Xinlan Zhou",
      "Mark Sherwood",
      "Nino Yannoni",
      "Mark Kubinec",
      "Isaac Chuang"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.60.1924",
    "journal_ref": "Phys.Rev. A60 (1999) 1924-1943",
    "title": "Experimental Realization of A Two Bit Phase Damping Quantum Code",
    "url": "https://arxiv.org/abs/quant-ph/9811068"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "3ef7fc9b-bb56-4c10-b6f8-3dd1af96a738",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}