{
  "annotation_id": "3b38a027-5068-4018-9c5a-b2224d4c99ef",
  "date_created": "2026-03-02T18:02:05.808000Z",
  "date_modified": "2026-03-02T18:02:05.808000Z",
  "file_hash": "ec78905d3b6de28b16f5bb98360a653e60b4476f4dd271f521cfcc695c06f7f5",
  "private": false,
  "record": {
    "abstract": "Recently spherical codes were introduced as potentially more capable\nensembles for quantum key distribution. Here we develop specific key creation\nprotocols for the two qubit-based spherical codes, the trine and tetrahedron,\nand analyze them in the context of a suitably-tailored intercept/resend attack,\nboth in standard form, and a ``gentler\u0027\u0027 version whose back-action on the\nquantum state is weaker. When compared to the standard unbiased basis\nprotocols, BB84 and six-state, two distinct advantages are found. First, they\noffer improved tolerance of eavesdropping, the trine besting its counterpart\nBB84 and the tetrahedron the six-state protocol. Second, the key error rate may\nbe computed from the sift rate of the protocol itself, removing the need to\nsacrifice key bits for this purpose. This simplifies the protocol and improves\nthe overall key rate.",
    "arxiv_id": "quant-ph/0402135",
    "authors": [
      "Joseph M. Renes"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.70.052314",
    "journal_ref": "Phys. Rev. A 70, 052314 (2004)",
    "title": "Spherical Code Key Distribution Protocols for Qubits",
    "url": "https://arxiv.org/abs/quant-ph/0402135"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "69734075-2065-4852-a6b6-60b16f9e01a9",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}