{
  "annotation_id": "48a92ee5-d850-4f31-b6bd-e672b1e09658",
  "date_created": "2026-03-02T18:02:30.341000Z",
  "date_modified": "2026-03-02T18:02:30.341000Z",
  "file_hash": "9428f6d8da9ab657097a7a168f209987910a43a701fc0a1aa6279c15b04cb0be",
  "private": false,
  "record": {
    "abstract": "Recently, there has been growing interest in employing condensed matter\nsystems such as quantum spin or harmonic chains as quantum channels for short\ndistance communication. Many properties of such chains are determined by the\nspectral gap between their ground and excited states. In particular this gap\nvanishes at critical points of quantum phase transitions. In this article we\nstudy the relation between the transfer speed and quality of such a system and\nthe size of its spectral gap. We find that the transfer is almost perfect but\nslow for large spectral gaps and fast but rather inefficient for small gaps.",
    "arxiv_id": "quant-ph/0608051",
    "authors": [
      "Michael J. Hartmann",
      "Moritz E. Reuter",
      "Martin B. Plenio"
    ],
    "categories": [
      "quant-ph",
      "cond-mat.str-el"
    ],
    "doi": "10.1134/S0030400X0707003X",
    "title": "Excitation and Entanglement Transfer Near Quantum Critical Points",
    "url": "https://arxiv.org/abs/quant-ph/0608051"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "0a6c8bde-f08f-4903-9f2e-7487362f509c",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}