{
  "annotation_id": "c2b6f257-673e-4b6f-9938-7d5960ce304a",
  "date_created": "2026-03-02T18:02:12.974000Z",
  "date_modified": "2026-03-02T18:02:12.974000Z",
  "file_hash": "2d602926c040e02d99321dfd0deb40bfcad798c29afabc4cc34bc9e38b47032a",
  "private": false,
  "record": {
    "abstract": "We study the field dependence of the entanglement of formation in anisotropic\nS=1/2 antiferromagnetic chains and two-leg ladders displaying a T=0\nfield-driven quantum phase transition. The analysis is carried out via Quantum\nMonte Carlo simulations. At zero temperature the entanglement estimators show\nabrupt changes at and around criticality, vanishing below the critical field,\nin correspondence with an exactly factorized state, and then immediately\nrecovering a finite value upon passing through the quantum phase transition. At\nthe quantum critical point, a deep minimum in the pairwise-to-global\nentanglement ratio shows that multi-spin entanglement is strongly enhanced;\nmoreover this signature represents a novel way of detecting the quantum phase\ntransition of the system, relying entirely on entanglement estimators.",
    "arxiv_id": "quant-ph/0412056",
    "authors": [
      "Tommaso Roscilde",
      "Paola Verrucchi",
      "Andrea Fubini",
      "Stephan Haas",
      "Valerio Tognetti"
    ],
    "categories": [
      "quant-ph",
      "cond-mat.str-el"
    ],
    "title": "Entanglement in quantum critical spin systems",
    "url": "https://arxiv.org/abs/quant-ph/0412056"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "a2024571-0858-42ac-aed0-54dd930ddf6f",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}