{
  "annotation_id": "cf8f69d2-a23e-4fe5-a777-877257265e9e",
  "date_created": "2026-03-02T18:02:33.506000Z",
  "date_modified": "2026-03-02T18:02:33.506000Z",
  "file_hash": "008383e911003db4e9ad8f02c64bc803abb70d54f0fca1489c164b1ce9dcb3e2",
  "private": false,
  "record": {
    "abstract": "We present the experimental realization of optimal symmetric and asymmetric\nphase-covariant 1-\u003e2 cloning of qubit states using fiber optics. State of each\nqubit is encoded into a single photon which can propagate through two optical\nfibers. The operation of our device is based on one- and two-photon\ninterference. We have demonstrated creation of two copies of any state of a\nqubit from the equator of the Bloch sphere. The measured fidelities of both\ncopies are close to the theoretical values and they surpass the theoretical\nmaximum obtainable with the universal cloner.",
    "arxiv_id": "quant-ph/0612119",
    "authors": [
      "Lucie Bartuskova",
      "Miloslav Dusek",
      "Antonin Cernoch",
      "Jan Soubusta",
      "Jaromir Fiurasek"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevLett.99.120505",
    "journal_ref": "Phys. Rev. Lett. 99, 120505 (2007).",
    "title": "Fibre-optics implementation of asymmetric phase-covariant quantum cloner",
    "url": "https://arxiv.org/abs/quant-ph/0612119"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "e167ff11-a08d-4984-a3eb-b54696041a96",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}