{
  "annotation_id": "5507dba0-c332-4760-b5f4-e86f4dcd33ab",
  "date_created": "2026-03-02T18:02:03.640000Z",
  "date_modified": "2026-03-02T18:02:03.640000Z",
  "file_hash": "d784df0b8c45554d55017a26320d6bf6c0d05afde787bb1d39a486b2dcffb05b",
  "private": false,
  "record": {
    "abstract": "We discuss entanglement in the spin-1/2 anisotropic ferromagnetic Heisenberg\nchain in the presence of a boundary magnetic field generating domain walls. By\nincreasing the magnetic field, the model undergoes a first-order quantum phase\ntransition from a ferromagnetic to a kink-type phase, which is associated to a\njump in the content of entanglement available in the system. Above the critical\npoint, pairwise entanglement is shown to be non-vanishing and independent of\nthe boundary magnetic field for large chains. Based on this result, we provide\nan analytical expression for the entanglement between arbitrary spins. Moreover\nthe effects of the quantum domains on the gapless region and for\nantiferromagnetic anisotropy are numerically analysed. Finally multiparticle\nentanglement properties are considered, from which we establish a\ncharacterization of the critical anisotropy separating the gapless regime from\nthe kink-type phase.",
    "arxiv_id": "quant-ph/0312039",
    "authors": [
      "F. C. Alcaraz",
      "A. Saguia",
      "M. S. Sarandy"
    ],
    "categories": [
      "quant-ph",
      "cond-mat"
    ],
    "doi": "10.1103/PhysRevA.70.032333",
    "journal_ref": "Phys. Rev. A 70, 032333 (2004)",
    "title": "Entanglement and Quantum Phases in the Anisotropic Ferromagnetic   Heisenberg Chain in the Presence of Domain Walls",
    "url": "https://arxiv.org/abs/quant-ph/0312039"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "2a4a1680-2f25-4c3d-9394-8f2931ce8158",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}