{
  "id": "1211.2328",
  "version": "v3",
  "published": "2012-11-10T14:37:00.000Z",
  "updated": "2013-02-21T15:15:53.000Z",
  "title": "Unitary Invariants and Classification of Four-Qubit States via Negativity Fonts",
  "authors": [
    "S. Shelly Sharma",
    "N. K. Sharma"
  ],
  "comment": "12 pages, revtex, Eq. 26 and other Typos corrected",
  "journal": "Phys. Rev. A 87, 022335 (2013)",
  "doi": "10.1103/PhysRevA.87.022335",
  "categories": [
    "quant-ph"
  ],
  "abstract": "Local unitary invariance and the notion of negativity fonts are used as the principle tools to construct four qubit invariants of degree 8, 12, and 24. A degree 8 polynomial invariant that is non-zero on pure four qubit states with four-body correlations and zero on all other states, is identified. Classification of four qubit states into seven major classes, using criterion based on the nature of correlations, is discussed.",
  "revisions": [
    {
      "version": "v3",
      "updated": "2013-02-21T15:15:53.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "03.65.Ud",
      "03.67.Mn"
    ],
    "keywords": [
      "negativity fonts",
      "unitary invariants",
      "four-qubit states",
      "classification",
      "local unitary invariance"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review A",
      "year": 2013,
      "month": "Feb",
      "volume": 87,
      "number": 2,
      "pages": "022335"
    },
    "note": {
      "typesetting": "RevTeX",
      "pages": 12,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 1244719,
      "adsabs": "2013PhRvA..87b2335S"
    }
  }
}