{
  "annotation_id": "92be445b-dbd9-4839-b859-962d33e57229",
  "date_created": "2026-03-02T18:02:23.957000Z",
  "date_modified": "2026-03-02T18:02:23.957000Z",
  "file_hash": "bffc7fcb85e11b14abccb71b08c8227bc65afce13c26c35c72930940c2ae63c8",
  "private": false,
  "record": {
    "abstract": "Entanglement detection typically relies on linear inequalities for mean\nvalues of certain observables (entanglement witnesses), where violation\nindicates entanglement. We provide a general method to improve any of these\ninequalities for bipartite systems via nonlinear expressions. The\nnonlinearities are of different orders and can be directly measured in\nexperiments, often without any extra effort.",
    "arxiv_id": "quant-ph/0512164",
    "authors": [
      "Otfried G\u00fchne",
      "Norbert L\u00fctkenhaus"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevLett.96.170502",
    "journal_ref": "Phys. Rev. Lett. 96, 170502 (2006)",
    "title": "Nonlinear entanglement witnesses",
    "url": "https://arxiv.org/abs/quant-ph/0512164"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "91a00bf1-6726-44c4-aa24-09229b3b28bd",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}