{
  "annotation_id": "f4c6c822-3a89-4c6f-8b34-c9921a2850cc",
  "date_created": "2026-03-02T18:01:42.648000Z",
  "date_modified": "2026-03-02T18:01:42.648000Z",
  "file_hash": "c82f867b1d2cd2d38db0dd8d07fe4f8956ed74a29e1f65c57dd081564b9893a0",
  "private": false,
  "record": {
    "abstract": "We investigate the entanglement arising naturally in a 1D Ising chain in a\nmagnetic field in an arbitrary direction. We find that for different\ntemperatures, different orientations of the magnetic field give maximum\nentanglement. In the high temperature limit, this optimal orientation\ncorresponds to the magnetic field being perpendicular to the Ising orientation\n(z direction). In the low temperature limit, we find that varying the angle of\nthe magnetic field very slightly from the z direction leads to a rapid rise in\nentanglement. We also find that the orientation of the magnetic field for\nmaximum entanglement varies with the field amplitude. Furthermore, we have\nderived a simple rule for the mixing of concurrences (a measure of\nentanglement) due to mixing of pure states satisfying certain conditions.",
    "arxiv_id": "quant-ph/0102137",
    "authors": [
      "D. Gunlycke",
      "S. Bose",
      "V. M. Kendon",
      "V. Vedral"
    ],
    "categories": [
      "quant-ph",
      "cond-mat"
    ],
    "doi": "10.1103/PhysRevA.64.042302",
    "journal_ref": "Phys. Rev. A 64, 042302 (2001)",
    "title": "Thermal concurrence mixing in a 1D Ising model",
    "url": "https://arxiv.org/abs/quant-ph/0102137"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "4e058f42-a80c-4aae-9ea5-756c59e646d3",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}