{
  "annotation_id": "9066aecc-5e14-4d6b-9da2-cadae7b79179",
  "date_created": "2026-03-02T18:02:06.270000Z",
  "date_modified": "2026-03-02T18:02:06.270000Z",
  "file_hash": "70d64de5f8204557e579808a3213a6215fcd68a5bfbc4f4a3a188ea080c7a047",
  "private": false,
  "record": {
    "abstract": "We consider the problem of correcting the errors incurred from sending\nquantum information through a noisy quantum environment by using classical\ninformation obtained from a measurement on the environment. For discrete time\nMarkovian evolutions, in the case of fixed measurement on the environment, we\ngive criteria for quantum information to be perfectly corrigible and\ncharacterize the related feedback. Then we analyze the case when perfect\ncorrection is not possible and, in the qubit case, we find optimal feedback\nmaximizing the channel fidelity.",
    "arxiv_id": "quant-ph/0403092",
    "authors": [
      "M. Gregoratti",
      "R. F. Werner"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1063/1.1758320",
    "title": "On quantum error-correction by classical feedback in discrete time",
    "url": "https://arxiv.org/abs/quant-ph/0403092"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "dfe117ab-995f-4336-a65b-4c23d670dbd5",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}