{
  "annotation_id": "fe154e3e-c967-4f1c-a017-c8b44fb63d75",
  "date_created": "2026-03-02T18:02:48.373000Z",
  "date_modified": "2026-03-02T18:02:48.373000Z",
  "file_hash": "dd44975df3118a79c082e92acbd3b62a534fcbbf00b1694abf033f535cfd8c6c",
  "private": false,
  "record": {
    "abstract": "The coherent information concept is used to analyze a variety of simple\nquantum systems. Coherent information was calculated for the information decay\nin a two-level atom in the presence of an external resonant field, for the\ninformation exchange between two coupled two-level atoms, and for the\ninformation transfer from a two-level atom to another atom and to a photon\nfield. The coherent information is shown to be equal to zero for all\nfull-measurement procedures, but it completely retains its original value for\nquantum duplication. Transmission of information from one open subsystem to\nanother one in the entire closed system is analyzed to learn quantum\ninformation about the forbidden atomic transition via a dipole active\ntransition of the same atom. It is argued that coherent information can be used\neffectively to quantify the information channels in physical systems where\nquantum coherence plays an important role.",
    "arxiv_id": "quant-ph/9912113",
    "authors": [
      "B. A. Grishanin",
      "V. N. Zadkov"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.62.032303",
    "journal_ref": "Phys. Rev. A 62, 032303 (2000)",
    "title": "Coherent information analysis of quantum channels in simple quantum   systems",
    "url": "https://arxiv.org/abs/quant-ph/9912113"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "14c65b28-b117-48aa-833e-32cff6dc811a",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}