{
  "id": "0905.0115",
  "version": "v1",
  "published": "2009-05-01T16:56:12.000Z",
  "updated": "2009-05-01T16:56:12.000Z",
  "title": "Entanglement of electron pairs extracted from a many-body system",
  "authors": [
    "A. Ramsak",
    "J. Mravlje",
    "T. Rejec",
    "A. Lautar"
  ],
  "journal": "Europhys. Lett. 86, 40003 (2009)",
  "categories": [
    "cond-mat.mes-hall",
    "cond-mat.str-el"
  ],
  "abstract": "Entanglement of spins is analyzed for two electrons extracted from a mixed many electron state by projecting onto the two-electron subspace. The concurrence formulae are expressed in a compact form for states with a well defined square of the total spin projection. As an example, the thermal entanglement for a qubit pair with an anisotropic Heisenberg and the Dzyaloshinskii-Moriya interactions in an inhomogeneous magnetic field is given analytically. Remarkably, the concurrence of a pair of electrons with antiparallel spins and in a delocalised orbital state is given by the scalar product of the state with its spin-flipped state and not with the time-reversed state.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2009-05-01T16:56:12.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "electron pairs",
      "many-body system",
      "total spin projection",
      "electron state",
      "compact form"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1209/0295-5075/86/40003",
      "journal": "EPL (Europhysics Letters)",
      "year": 2009,
      "month": "May",
      "volume": 86,
      "number": 4,
      "pages": 40003
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2009EL.....8640003R"
    }
  }
}