{
  "annotation_id": "d48e2bc4-913d-4237-983e-06ba0ad0492a",
  "date_created": "2026-03-02T18:02:10.465000Z",
  "date_modified": "2026-03-02T18:02:10.465000Z",
  "file_hash": "0b199c770b2665326562fdc229b6f6e08060799b4f996cb506248fc66278c83a",
  "private": false,
  "record": {
    "abstract": "We consider the storage and transmission of a Gaussian distributed set of\ncoherent states of continuous variable systems. We prove a limit on the average\nfidelity achievable when the states are transmitted or stored by a classical\nchannel, i.e., a measure and repreparation scheme which sends or stores\nclassical information only. The obtained bound is tight and serves as a\nbenchmark which has to be surpassed by quantum channels in order to outperform\nany classical strategy. The success in experimental demonstrations of quantum\nmemories as well as quantum teleportation has to be judged on this footing.",
    "arxiv_id": "quant-ph/0409109",
    "authors": [
      "K. Hammerer",
      "M. M. Wolf",
      "E. S. Polzik",
      "J. I. Cirac"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevLett.94.150503",
    "journal_ref": "PRL 94, 150503 (2005)",
    "title": "Quantum benchmark for storage and transmission of coherent states",
    "url": "https://arxiv.org/abs/quant-ph/0409109"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "1f17ddf7-d685-4aef-aaa3-b57cdc53bffe",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}