{
  "annotation_id": "1a63026a-e4b6-49df-9bd1-8380d30ccb1a",
  "date_created": "2026-03-02T18:01:49.581000Z",
  "date_modified": "2026-03-02T18:01:49.581000Z",
  "file_hash": "2cc80fdeb2e99f7461f1277e533ec20042c59b0518d894ffc1fe77850eee02b0",
  "private": false,
  "record": {
    "abstract": "Classical and quantum information theory are simply explained. To be more\nspecific it is clarified why Shannon entropy is used as measure of classical\ninformation and after a brief review of quantum mechanics it is possible to\ndemonstrate why the density matrix is the main tool of quantum information\ntheory. Then von Neumann entropy is introduced and with its help a great\ndifference between classical and quantum information theory is presented:\nquantum entanglement. Moreover an information theoretic interpretation of\nquantum measurement is discussed. Data compression, error correction and noisy\nchannel transmission are simply demonstrated for both classical and quantum\ncases. Finally using the above theory quantum cryptography is reviewed and the\npossibility of a commercial device realizing it is explored.",
    "arxiv_id": "quant-ph/0201057",
    "authors": [
      "Nikolaos P. Papadakos"
    ],
    "categories": [
      "quant-ph"
    ],
    "title": "Quantum Information Theory and Applications to Quantum Cryptography",
    "url": "https://arxiv.org/abs/quant-ph/0201057"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "20cccf0c-0e71-4a79-ba57-6dac752adfb2",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}