{
  "annotation_id": "396cece8-5610-4b91-9f46-70c16607608b",
  "date_created": "2026-03-02T18:02:17.083000Z",
  "date_modified": "2026-03-02T18:02:17.083000Z",
  "file_hash": "3436762ae321eff8d1b176e45eb2de5256489bf43eee12830ea23ffbc1799657",
  "private": false,
  "record": {
    "abstract": "We investigate the problem of teleporting an unknown qubit state to a\nrecipient via a channel of $2\\L$ qubits. In this procedure a protocol is\nemployed whereby $\\L$ Bell state measurements are made and information based on\nthese measurements is sent via a classical channel to the recipient. Upon\nreceiving this information the recipient determines a local gate which is used\nto recover the original state. We find that the $2^{2\\L}$-dimensional Hilbert\nspace of states available for the channel admits a decomposition into four\nsubspaces. Every state within a given subspace is a perfect channel, and each\nsequence of Bell measurements projects $2\\L$ qubits of the system into one of\nthe four subspaces. As a result, only two bits of classical information need be\nsent to the recipient for them to determine the gate. We note some connections\nbetween these four subspaces and ground states of many-body Hamiltonian\nsystems, and discuss the implications of these results towards understanding\nentanglement in multi-qubit systems.",
    "arxiv_id": "quant-ph/0506071",
    "authors": [
      "Jon Links",
      "John Paul Barjaktarevic",
      "Gerard J. Milburn",
      "Ross H. McKenzie"
    ],
    "categories": [
      "quant-ph"
    ],
    "title": "Teleportation via multi-qubit channels",
    "url": "https://arxiv.org/abs/quant-ph/0506071"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "37f590d6-df89-4302-a7f3-54389f4d4023",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}