{
  "annotation_id": "a91e3ae2-b812-4f5a-bb13-60282a2aee45",
  "date_created": "2026-03-02T18:02:06.447000Z",
  "date_modified": "2026-03-02T18:02:06.447000Z",
  "file_hash": "c18c6135d31dbe1b9023d549c5753909c9b5e4c215b2c8747bea551f2fbf6614",
  "private": false,
  "record": {
    "abstract": "In this paper, we introduce and study the fermionic concurrence in a two-site\nextended Hubbard model. Its behaviors both at the ground state and finite\ntemperatures as function of Coulomb interaction $U$ (on-site) and $V$\n(nearest-neighbor) are obtained analytically and numerically. We also\ninvestigate the change of the concurrence under a nonuniform field, including\nlocal potential and magnetic field, and find that the concurrence can be\nmodulated by these fields.",
    "arxiv_id": "quant-ph/0406078",
    "authors": [
      "Shu-Sa Deng",
      "Shi-Jian Gu",
      "Hai-Qing Lin"
    ],
    "categories": [
      "quant-ph",
      "cond-mat.str-el"
    ],
    "doi": "10.1088/0256-307X/22/4/007",
    "journal_ref": "Chin. Phys. Lett. 22, 804 (2005).",
    "title": "Fermionic concurrence in the extended Hubbard dimer",
    "url": "https://arxiv.org/abs/quant-ph/0406078"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "e106df30-23f7-406b-af08-c7320d349774",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}