{
  "annotation_id": "884127a4-b4d2-42f7-832e-8f9b09080a7f",
  "date_created": "2026-03-02T18:02:03.668000Z",
  "date_modified": "2026-03-02T18:02:03.668000Z",
  "file_hash": "ccdbbd597a89443bb6c131e34d2d864fab9251f94ec50fa4e8af75a1e2581bf7",
  "private": false,
  "record": {
    "abstract": "We exhibit a two-parameter class of states $\\rho_{(\\alpha,\\gamma)}$, in\n$2\\otimes n$ quantum system for $n\\ge 3$, which can be obtained from an\narbitrary state by means of local quantum operations and classical\ncommunication, and which are invariant under all bilateral %unitary operations\n%of the form $U\\otimes U$ on $2\\otimes n$ quantum system. We calculate the\nnegativity of $\\rho_{(\\alpha,\\gamma)}$, and a lower bound and a tight upper\nbound on its entanglement of formation. It follows from this calculation that\nthe entanglement of formation of $\\rho_{(\\alpha,\\gamma)}$ cannot exceed its\nnegativity.",
    "arxiv_id": "quant-ph/0309073",
    "authors": [
      "Dong Pyo Chi",
      "Soojoon Lee"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1088/0305-4470/36/45/010",
    "journal_ref": "J. Phys. A 36, 11503 (2003)",
    "title": "Entanglement for a two-parameter class of states in $2\\otimes n$ quantum   system",
    "url": "https://arxiv.org/abs/quant-ph/0309073"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "de06c136-8dc1-4e70-a049-4faca4c5b8ef",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}