{
  "annotation_id": "3c09de64-7a69-446d-bcd3-682451685590",
  "date_created": "2026-03-02T18:02:20.424000Z",
  "date_modified": "2026-03-02T18:02:20.424000Z",
  "file_hash": "8ce61a6437204b276d031c3d52d9d4c744cf2f5887cf5f4dd9ef7c35906d00cb",
  "private": false,
  "record": {
    "abstract": "In this paper, we study block-block entanglement in the ground state of\none-dimensional extended Hubbard model. Our results show that the phase diagram\nderived from the block-block entanglement manifests richer structure than that\nof the local (single site) entanglement because it comprises nonlocal\ncorrelation. Besides phases characterized by the charge-density-wave, the\nspin-density-wave, and phase-separation, which can be sketched out by the local\nentanglement, singlet superconductivity phase could be identified on the\ncontour map of the block-block entanglement. Scaling analysis shows that ${\\rm\nlog}_2(l)$ behavior of the block-block entanglement may exist in both\nnon-critical and the critical regions, while some local extremum are induced by\nthe finite-size effect. We also study the block-block entanglement defined in\nthe momentum space and discuss its relation to the phase transition from\nsinglet superconducting state to the charge-density-wave state.",
    "arxiv_id": "quant-ph/0511103",
    "authors": [
      "Shu-Sa Deng",
      "Shi-Jian Gu",
      "Hai-Qing Lin"
    ],
    "categories": [
      "quant-ph",
      "cond-mat.str-el"
    ],
    "doi": "10.1103/PhysRevB.74.045103",
    "journal_ref": "S. S. Deng, S. J. Gu, and H. Q. Lin, Phys. Rev. B 74, 045103\n  (2006).",
    "title": "Block-block entanglement and quantum phase transitions in   one-dimensional extended Hubbard model",
    "url": "https://arxiv.org/abs/quant-ph/0511103"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "c82bdb8a-caf0-469e-abfe-80bcf9a7d796",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}