{
  "annotation_id": "06bd2222-745f-471e-9618-3df237442b54",
  "date_created": "2026-03-02T18:02:23.893000Z",
  "date_modified": "2026-03-02T18:02:23.893000Z",
  "file_hash": "6e5cb067ffeda8a75881939c8e32f45631c70d0221ea0f46cea764f4ff590521",
  "private": false,
  "record": {
    "abstract": "We consider quantum many body systems as quantum channels and study the\nrelation between the transfer quality and the size of the spectral gap between\nthe system\u0027s ground and excited states. In our setup two ancillas are weakly\ncoupled to the quantum many body system at different sites, and we study the\npropagation of an excitation and quantum information from one ancilla to the\nother. We observe two different scenarios: a slow, but perfect transfer if the\ngap large and a fast, but un-complete transfer otherwise. We provide a\nnumerical and analytical approach as well as a simplified physical model\nexplaining our findings. Our results relate the potential of spin chains acting\nas quantum channels to the concept of quantum phase transitions and offer a\ndifferent approach to the characterisation of these.",
    "arxiv_id": "quant-ph/0511185",
    "authors": [
      "Michael J. Hartmann",
      "Moritz E. Reuter",
      "Martin B. Plenio"
    ],
    "categories": [
      "quant-ph",
      "cond-mat.str-el"
    ],
    "doi": "10.1088/1367-2630/8/6/094",
    "journal_ref": "New J. Phys. 8, 94 (2006)",
    "title": "Excitation and Entanglement Transfer Versus Spectral Gap",
    "url": "https://arxiv.org/abs/quant-ph/0511185"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "07f9d8bf-7f1a-4fe6-943e-8a63b20362d4",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}