{
  "annotation_id": "ba1f7c68-86a3-4a5c-a389-68d9b14f1b9b",
  "date_created": "2026-03-02T18:02:27.238000Z",
  "date_modified": "2026-03-02T18:02:27.238000Z",
  "file_hash": "730c0374aec368db01905822f513efc786faf5ff6496dbea517a789f107e9741",
  "private": false,
  "record": {
    "abstract": "We investigate the cases where a set $S$ of states $\\{\\ket{\\psi_i} \\}$ cannot\nbe cloned by itself, but is clonable with the help of another system prepared\nin state $\\hat{\\rho}_i$. When $S$ is pair-wise nonorthogonal, it is known that\none can generate the copy from $\\hat{\\rho}_i$ alone, with no interaction with\nthe original system. Here we show that a set containing orthogonal pairs\nexhibits a property forming a striking contrast; For any such set, there is a\nchoice of $\\hat{\\rho}_i$ that enables cloning only when the two systems are\ninteracted in a purely quantum manner that is not achievable via classical\ncommunication.",
    "arxiv_id": "quant-ph/0604009",
    "authors": [
      "Koji Azuma",
      "Masato Koashi",
      "Hosho Katsura",
      "Nobuyuki Imoto"
    ],
    "categories": [
      "quant-ph"
    ],
    "title": "Quantum cloning with nonlocal assistance: Complement of Jozsa\u0027s stronger   no-cloning theorem",
    "url": "https://arxiv.org/abs/quant-ph/0604009"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "02dd72c7-e5c2-46b3-a046-b477d85937d2",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}