{
  "annotation_id": "7510ff91-08ce-4b0e-a311-95968a2cbccc",
  "date_created": "2026-03-02T18:01:49.076000Z",
  "date_modified": "2026-03-02T18:01:49.076000Z",
  "file_hash": "379f5bee2a251e4afdb12d941b98cae7aed00ce65f7faa29dda7ad010c55c0d5",
  "private": false,
  "record": {
    "abstract": "We consider situations in which i) Alice wishes to send quantum information\nto Bob via a noisy quantum channel, ii) Alice has a classical description of\nthe states she wishes to send and iii) Alice can make use of a finite amount of\nnoiseless classical information. After setting up the problem in general, we\nfocus attention on one specific scenario in which Alice sends a known qubit\ndown a depolarizing channel along with a noiseless cbit. We describe a protocol\nwhich we conjecture is optimal and calculate the average fidelity obtained. A\nsurprising amount of structure is revealed even for this simple case which\nsuggests that relationships between quantum and classical information could in\ngeneral be very intricate.",
    "arxiv_id": "quant-ph/0201073",
    "authors": [
      "Jonathan Barrett"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.68.012303",
    "journal_ref": "Phys. Rev. A 68, 012303 (2003)",
    "title": "Countering Quantum Noise with Supplementary Classical Information",
    "url": "https://arxiv.org/abs/quant-ph/0201073"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "06719b3f-bc7c-4894-9b15-3e0dd2b09f8f",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}