{
  "annotation_id": "164e5f9c-f7c2-4108-8059-d1df6d12dca9",
  "date_created": "2026-03-02T18:02:09.881000Z",
  "date_modified": "2026-03-02T18:02:09.881000Z",
  "file_hash": "2840de57970f2388c6d0fedbec15001d593af8d6c0f0d396fddb942edd6c349a",
  "private": false,
  "record": {
    "abstract": "We investigate whether the use of a noiseless, classical feedback channel\nwill increase the capacity of a quantum discrete memoryless channel to transmit\nclassical information. This problem has been previously analyzed by Bowen and\nNagarajan for the case of protocols restricted to product input states. They\nshowed that feedback did not increase the information capacity. In this paper\nwe introduce a quantum analogue of classical causality and prove a capacity\ntheorem (in regularized form) for the transmission of classical information.",
    "arxiv_id": "quant-ph/0409207",
    "authors": [
      "Andrew Skeen"
    ],
    "categories": [
      "quant-ph"
    ],
    "title": "Classical feedback for quantum channels",
    "url": "https://arxiv.org/abs/quant-ph/0409207"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "0b9fcb1d-ca6c-4d14-b705-c25d3651b69b",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}