{
  "annotation_id": "261c1aaf-1d54-4c2e-a4cb-ad1283a6d85e",
  "date_created": "2026-03-02T18:02:16.984000Z",
  "date_modified": "2026-03-02T18:02:16.984000Z",
  "file_hash": "bb4bc2541dcfe89942dfa0bc6650d49405febf1d20b21df0fffbb4035240d9d8",
  "private": false,
  "record": {
    "abstract": "We study an analytically solvable model for decoherence of a two spin system\nembedded in a large spin environment. As a measure of entanglement, we evaluate\nthe concurrence for the Bell states (Einstein-Podolsky-Rosen pairs). We find\nthat while for two separate spin baths all four Bell states lose their\ncoherence with the same time dependence, for a common spin bath, two of the\nstates decay faster than the others. We explain this difference by the relative\norientation of the individual spins in the pair. We also examine how the Bell\ninequality is violated in the coherent regime. Both for one bath and two bath\ncases, we find that while two of the Bell states always obey the inequality,\nthe other two initially violates the inequality at early times.",
    "arxiv_id": "quant-ph/0505176",
    "authors": [
      "Zafer Gedik"
    ],
    "categories": [
      "quant-ph",
      "cond-mat.mes-hall"
    ],
    "doi": "10.1016/j.ssc.2006.02.004",
    "journal_ref": "Solid State Communications, v. 138, p. 82 (2006)",
    "title": "Spin Bath Decoherence of Quantum Entanglement",
    "url": "https://arxiv.org/abs/quant-ph/0505176"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "6fdeb765-8041-4fcd-a980-c96eac6f5fbf",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}