{
  "id": "0805.1632",
  "version": "v1",
  "published": "2008-05-12T13:24:16.000Z",
  "updated": "2008-05-12T13:24:16.000Z",
  "title": "Separability and Entanglement of Quantum States Based on Covariance Matrices",
  "authors": [
    "Ming Li",
    "Shao-Ming Fei",
    "Zhi-Xi Wang"
  ],
  "comment": "11 pages",
  "journal": "J. Phys. A 41, Math. Theor.(2008)202002",
  "doi": "10.1088/1751-8113/41/20/202002",
  "categories": [
    "quant-ph"
  ],
  "abstract": "We investigate the separability of quantum states based on covariance matrices. Separability criteria are presented for multipartite states. The lower bound of concurrence proposed in Phys. Rev. A. 75, 052320 (2007) is improved by optimizing the local orthonormal observables.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2008-05-12T13:24:16.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "quantum states",
      "covariance matrices",
      "entanglement",
      "local orthonormal observables",
      "multipartite states"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "journal": "Journal of Physics A Mathematical General",
      "year": 2008,
      "month": "May",
      "volume": 41,
      "number": 20,
      "pages": 202002
    },
    "note": {
      "typesetting": "TeX",
      "pages": 11,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2008JPhA...41t2002L"
    }
  }
}