{
  "annotation_id": "fc0e3944-d3af-40ef-9230-346096033b0a",
  "date_created": "2026-03-02T18:02:07.105000Z",
  "date_modified": "2026-03-02T18:02:07.105000Z",
  "file_hash": "1acbfbbfc69ff88e33d93102c1a44865335e276a109aaf2651c79bf74533aa4e",
  "private": false,
  "record": {
    "abstract": "We study entanglement of electron spins in many-body systems based on the\nGreen\u0027s function approach. As an application we obtain the two-particle density\nmatrix of a non-interacting electron gas and identify its two-spin density\nmatrix as a Werner state. We calculate entanglement measures, a classical\ncorrelation, mutual information, and a pair distribution function of two\nelectrons at zero and finite temperatures. We find that changes of entanglement\nmeasures are proportional to $T^2$ at low temperatures.",
    "arxiv_id": "quant-ph/0403214",
    "authors": [
      "Sangchul Oh",
      "Jaewan Kim"
    ],
    "categories": [
      "quant-ph",
      "cond-mat.mes-hall"
    ],
    "doi": "10.1103/PhysRevA.69.054305",
    "journal_ref": "Physical Review A 69, 054305 (2004)",
    "title": "Entanglement of electron spins of non-interacting electron gases",
    "url": "https://arxiv.org/abs/quant-ph/0403214"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "3c7d76a7-ac6e-4b25-ab2e-0d264d2aaf34",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}