{
  "annotation_id": "18c150b8-02bd-4c05-8611-cd04d5d1c25e",
  "date_created": "2026-03-02T18:02:45.243000Z",
  "date_modified": "2026-03-02T18:02:45.243000Z",
  "file_hash": "d4a92e767a0d5ecc692ad528b5a4d010b58e7bab8371fcb3173835ca8403ad53",
  "private": false,
  "record": {
    "abstract": "We consider the actions of protocols involving local quantum operations and\nclassical communication (LQCC) on a single system consisting of two separated\nqubits. We give a complete description of the orbits of the space of states\nunder LQCC and characterise the representatives with maximal entanglement of\nformation. We thus obtain a LQCC entanglement concentration protocol for a\nsingle given state (pure or mixed) of two qubits which is optimal in the sense\nthat the protocol produces, with non-zero probability, a state of maximal\npossible entanglement of formation. This defines a new entanglement measure,\nthe maximum extractable entanglement.",
    "arxiv_id": "quant-ph/9902022",
    "authors": [
      "Adrian Kent",
      "Noah Linden",
      "Serge Massar"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevLett.83.2656",
    "journal_ref": "Phys.Rev.Lett. 83 (1999) 2656-2659",
    "title": "Optimal Entanglement Enhancement for Mixed States",
    "url": "https://arxiv.org/abs/quant-ph/9902022"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "e320dcc0-a162-400b-8c9d-f3bc27c3b3dd",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}