{
  "annotation_id": "a2afcdec-6bf3-419f-9e5b-5b31d2545dc2",
  "date_created": "2026-03-02T18:02:30.342000Z",
  "date_modified": "2026-03-02T18:02:30.342000Z",
  "file_hash": "c66d1769830abf4d7fc8cd1da26fbe5d5a5cb0381212c00ae32ca815892d17ee",
  "private": false,
  "record": {
    "abstract": "We investigate the competition between pair entanglement of two spin qubits\nin double quantum dots attached to leads with various topologies and the\nseparate entanglement of each spin with nearby electrodes. Universal behavior\nof entanglement is demonstrated in dependence on the mutual interactions\nbetween the spin qubits, the coupling to their environment, temperature and\nmagnetic field. As a consequence of quantum phase transition an abrupt switch\nbetween fully entangled and unentangled states takes place when the dots are\ncoupled in parallel.",
    "arxiv_id": "quant-ph/0608065",
    "authors": [
      "A. Ramsak",
      "J. Mravlje",
      "R. Zitko",
      "J. Bonca"
    ],
    "categories": [
      "quant-ph",
      "cond-mat.mes-hall",
      "cond-mat.str-el"
    ],
    "doi": "10.1103/PhysRevB.74.241305",
    "journal_ref": "Phys. Rev. B 74, 241305(R) (2006)",
    "title": "Spin qubits in double quantum dots - entanglement versus the Kondo   effect",
    "url": "https://arxiv.org/abs/quant-ph/0608065"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "5cf5d41a-5a8d-486a-9655-52a6bd6a3c75",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}