{
  "id": "quant-ph/0203087",
  "version": "v1",
  "published": "2002-03-18T19:48:07.000Z",
  "updated": "2002-03-18T19:48:07.000Z",
  "title": "Entanglement for rank-2 mixed states",
  "authors": [
    "Tobias J. Osborne"
  ],
  "comment": "5 pages, uses amsthm and mathrsfs",
  "journal": "Phys. Rev. A 72, 022309 (2005)",
  "doi": "10.1103/PhysRevA.72.022309",
  "categories": [
    "quant-ph"
  ],
  "abstract": "In a recent paper, Rungta et. al. [Phys. Rev. A, 64, 042315, 2001] introduced a measure of mixed-state entanglement called the I-concurrence for arbitrary pairs of qudits. We find an exact formula for an entanglement measure closely related to the I-concurrence, the I-tangle, for all mixed states of two qudits having no more than two nonzero eigenvalues. We use this formula to provide a tight upper bound for the entanglement of formation for rank-2 mixed states of a qubit and a qudit.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2002-03-18T19:48:07.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "mixed states",
      "tight upper bound",
      "mixed-state entanglement",
      "i-concurrence",
      "arbitrary pairs"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. A"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 5,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}