{
  "annotation_id": "38e93472-be45-4994-a1ce-e7a5773a954c",
  "date_created": "2026-03-02T18:02:03.532000Z",
  "date_modified": "2026-03-02T18:02:03.532000Z",
  "file_hash": "cc7de05880c3ce0a9c95174408623d558a9a60d865b032129f781716917a76a7",
  "private": false,
  "record": {
    "abstract": "Here, asymmetric phase-covariant quantum cloning machines are defined and\ntrade-off between qualities of their outputs and its impact on entanglement\nproperties of the outputs are studies. In addition, optimal families among\nthese cloners are introduced and also their entanglement properties are\ninvestigated. An explicit proof of optimality is presented for the case of\nqubits, which is based on the no-signaling condition. Our optimality proof can\nalso be used to derive an upper bound on trade-off relations for a more general\nclass of optimal cloners which clone states on a specific orbit of the Bloch\nsphere. It is shown that the optimal cloners of the equatorial states, as in\nthe case of symmetric phase-covariant cloning, give rise to two separable\nclones, and in this sense these states are unique. For these cloners it is\nshown that total output is of GHZ-type.",
    "arxiv_id": "quant-ph/0312024",
    "authors": [
      "A. T. Rezakhani",
      "S. Siadatnejad",
      "A. H. Ghaderi"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1016/j.physleta.2004.12.015",
    "journal_ref": "Phys. Lett. A 336, 278 (2005)",
    "title": "Separability in Asymmetric Phase-Covariant Cloning",
    "url": "https://arxiv.org/abs/quant-ph/0312024"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "2e744478-272a-4ea9-8544-4370eb535763",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}