{
  "annotation_id": "86f22b42-e172-4cea-ae23-52b20393f799",
  "date_created": "2026-03-02T18:02:20.527000Z",
  "date_modified": "2026-03-02T18:02:20.527000Z",
  "file_hash": "4a75857631349cf864dd502f52b99d3dd43d2954c7470688c00de521e2ed585c",
  "private": false,
  "record": {
    "abstract": "In quantum chemistry calculations, the correlation energy is defined as the\ndifference between the Hartree-Fock limit energy and the exact solution of the\nnonrelativistic Schrodinger equation. With this definition, the electron\ncorrelation effects are not directly observable. In this report, we show that\nthe entanglement can be used as an alternative measure of the electron\ncorrelation in quantum chemistry calculations. Entanglement is directly\nobservable and it is one of the most striking properties of quantum mechanics.\nAs an example we calculate the entanglement for He atom and H2 molecule with\ndifferent basis sets.",
    "arxiv_id": "quant-ph/0507148",
    "authors": [
      "Zhen Huang",
      "Sabre Kais"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1016/j.cplett.2005.07.045",
    "title": "Entanglement as Measure of Electron-Electron Correlation in Quantum   Chemistry Calculations",
    "url": "https://arxiv.org/abs/quant-ph/0507148"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "80c84937-c5fa-41fa-9003-04d1d946eb94",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}