{
  "annotation_id": "c8164e9f-20f2-4814-ac2b-4ee36ffced39",
  "date_created": "2026-03-02T18:02:34.660000Z",
  "date_modified": "2026-03-02T18:02:34.660000Z",
  "file_hash": "9993d2262d099fcb25dc69b888ae24867adba643643dbf5cea1ee0172d68ac27",
  "private": false,
  "record": {
    "abstract": "The information encoded in the polarization of a single photon can be\ntransferred to a remote location by two-channel continuous-variable quantum\nteleportation. However, the finite entanglement used in the teleportation\ncauses random changes in photon number. If more than one photon appears in the\noutput, the continuous-variable teleportation accidentally produces clones of\nthe original input photon. In this paper, we derive the polarization statistics\nof the $N$-photon output components and show that they can be decomposed into\nan optimal cloning term and completely unpolarized noise. We find that the\naccidental cloning of the input photon is nearly optimal at experimentally\nfeasible squeezing levels, indicating that the loss of polarization information\nis partially compensated by the availability of clones.",
    "arxiv_id": "quant-ph/0702204",
    "authors": [
      "Toshiki Ide",
      "Holger F. Hofmann"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.75.062311",
    "journal_ref": "Phys. Rev. A 75, 062311 (2007)",
    "title": "Accidental cloning of a single-photon qubit in two-channel   continuous-variable quantum teleportation",
    "url": "https://arxiv.org/abs/quant-ph/0702204"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "8a81763e-5b51-4857-bce1-de1a424315f6",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}