{
  "annotation_id": "24c75cd8-67dd-4499-8336-94e531efc128",
  "date_created": "2026-03-02T18:01:52.303000Z",
  "date_modified": "2026-03-02T18:01:52.303000Z",
  "file_hash": "105060a6afea9c7f2792812e8a026b3a0e6a2abb732465395a6460e688e6e15c",
  "private": false,
  "record": {
    "abstract": "Two-qubit operations may be characterized by their capacities for\ncommunication, both with and without free entanglement, and their capacity for\ncreating entanglement. We establish a set of inequalities that give an ordering\nto the capacities of two-qubit unitary operations. Specifically, we show that\nthe capacities for entanglement creation and bidirectional communication\nwithout entanglement assistance are at least as great as half the bidirectional\ncommunication capacity with entanglement assistance. In addition, we show that\nthe bidirectional communication that can be performed using an ensemble may be\nincreased via a two-qubit unitary operation by twice the operation\u0027s capacity\nfor entanglement.",
    "arxiv_id": "quant-ph/0207065",
    "authors": [
      "Dominic W. Berry",
      "Barry C. Sanders"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.68.032312",
    "journal_ref": "Phys. Rev. A. 68, 032312 (2003)",
    "title": "Relation between classical communication capacity and entanglement   capability for two-qubit unitary operations",
    "url": "https://arxiv.org/abs/quant-ph/0207065"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "96cccc85-0353-407f-88b8-088c60b33702",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}