{
  "id": "0710.4061",
  "version": "v3",
  "published": "2007-10-22T13:49:10.000Z",
  "updated": "2010-12-24T10:52:04.000Z",
  "title": "The quantum entanglement contained in density matrices",
  "authors": [
    "Yong Zhou"
  ],
  "comment": "5 pages",
  "categories": [
    "quant-ph"
  ],
  "abstract": "We point out that density matrices can only be used to describe quantum states, so the entanglement contained in a density matrix is just quantum entanglement. This means a bipartite state described by a density matrix contains quantum entanglement, unless the density matrix has the form $\\rho_{AB}=\\rho_A\\otimes \\rho_B$.",
  "revisions": [
    {
      "version": "v3",
      "updated": "2010-12-24T10:52:04.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "density matrices",
      "density matrix contains quantum entanglement",
      "quantum states",
      "bipartite state"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 5,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2007arXiv0710.4061Z"
    }
  }
}