{
  "annotation_id": "f8d88dc5-7106-4586-b355-771a5718808c",
  "date_created": "2026-03-02T18:02:13.277000Z",
  "date_modified": "2026-03-02T18:02:13.277000Z",
  "file_hash": "4f3a8a81bb5e73287d6d68c4dfddb743708d1f0a2a792ef2add807ad883aed22",
  "private": false,
  "record": {
    "abstract": "The concept of local concurrence is used to quantify the entanglement between\na single qubit and the remainder of a multi-qubit system. For the ground state\nof the BCS model in the thermodynamic limit the set of local concurrences\ncompletely describe the entanglement. As a measure for the entanglement of the\nfull system we investigate the Average Local Concurrence (ALC). We find that\nthe ALC satisfies a simple relation with the order parameter. We then show that\nfor finite systems with fixed particle number, a relation between the ALC and\nthe condensation energy exposes a threshold coupling. Below the threshold,\nentanglement measures besides the ALC are significant.",
    "arxiv_id": "quant-ph/0411032",
    "authors": [
      "Clare Dunning",
      "Jon Links",
      "Huan-Qiang Zhou"
    ],
    "categories": [
      "quant-ph",
      "cond-mat.str-el",
      "hep-th"
    ],
    "doi": "10.1103/PhysRevLett.94.227002",
    "journal_ref": "Phys.Rev.Lett. 94 (2005) 227002",
    "title": "Quantifying ground state entanglement of the BCS model",
    "url": "https://arxiv.org/abs/quant-ph/0411032"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "1328ad89-0faa-48d6-b1d9-b56bda8a9768",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}