{
  "annotation_id": "2929417b-1485-4c6b-b7c9-b85f8f4f33b7",
  "date_created": "2026-03-02T18:02:02.793000Z",
  "date_modified": "2026-03-02T18:02:02.793000Z",
  "file_hash": "8fb0c38da58fcd5b9479fef716d1c9f8b636ce5947c32530876739a99421d138",
  "private": false,
  "record": {
    "abstract": "We extend the concept of the negativity, a good measure of entanglement for\nbipartite pure states, to mixed states by means of the convex-roof extension.\nWe show that the measure does not increase under local quantum operations and\nclassical communication, and derive explicit formulae for the entanglement\nmeasure of isotropic states and Werner states, applying the formalism presented\nby Vollbrecht and Werner [Phys. Rev. A {\\bf 64}, 062307 (2001)].",
    "arxiv_id": "quant-ph/0310027",
    "authors": [
      "Soojoon Lee",
      "Dong Pyo Chi",
      "Sung Dahm Oh",
      "Jaewan Kim"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.68.062304",
    "journal_ref": "Phys. Rev. A 68, 062304 (2003)",
    "title": "Convex-roof extended negativity as an entanglement measure for bipartite   quantum systems",
    "url": "https://arxiv.org/abs/quant-ph/0310027"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "3f7661c8-3135-4ea9-a259-5cada5ff68a0",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}