{
  "annotation_id": "63d38ff5-4a6b-4a03-aad3-6a081535945a",
  "date_created": "2026-03-02T18:02:33.452000Z",
  "date_modified": "2026-03-02T18:02:33.452000Z",
  "file_hash": "d7958943df47901584f42e130c0b45fe8104dfbabd598654ab0c3bf8f2c2a98c",
  "private": false,
  "record": {
    "abstract": "The ground state of a one-dimensional spin-1/2 chain with periodical boundary\ncondition in the Heisenberg XY model is investigated. We consider the spatial\ncorrelation and concurrence between any nearest-neighbor pair of spins under\nthe conditions of different coupling strength, anisotropic parameter and\nmagnitude of a transverse field. Quantum phase transitions due to the\ncompetition between coupling and alignment which cause the abrupt changes of\nthe correlation and concurrence are observed. The transition are direct results\nof the level crossing.",
    "arxiv_id": "quant-ph/0611270",
    "authors": [
      "Jun Jing",
      "H. R. Ma"
    ],
    "categories": [
      "quant-ph"
    ],
    "title": "Level crossing and quantum phase transition of the XY model",
    "url": "https://arxiv.org/abs/quant-ph/0611270"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "6f81b909-38ad-4b3e-a211-82d3e34244bd",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}