{
  "annotation_id": "e083c3f8-960e-413a-b09a-00bcffa62b24",
  "date_created": "2026-03-02T18:02:10.173000Z",
  "date_modified": "2026-03-02T18:02:10.173000Z",
  "file_hash": "3647c500949acf8b84fef02fa80765fe2fe588f742565750b5c2d3ff6ae43605",
  "private": false,
  "record": {
    "abstract": "We study the effect of inhomogeneities in the magnetic field on the thermal\nentanglement of a two spin system. We show that in the ferromagnetic case a\nvery small inhomogeneity is capable to produce large values of thermal\nentanglement. This shows that the absence of entanglement in the ferromagnetic\nHeisenberg system is highly unstable against inhomogeneoity of magnetic fields\nwhich is inevitably present in any solid state realization of qubits.",
    "arxiv_id": "quant-ph/0407073",
    "authors": [
      "M. Asoudeh",
      "V. Karimipour"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.71.022308",
    "journal_ref": "Physical Rev. A, 71, 022308 (2005)",
    "title": "Thermal entanglement of spins in a nonuniform magnetic field",
    "url": "https://arxiv.org/abs/quant-ph/0407073"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "2200d3ad-59b7-4485-9920-8fe4a047e7ec",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}