{
  "id": "quant-ph/0305094",
  "version": "v3",
  "published": "2003-05-17T00:52:51.000Z",
  "updated": "2003-11-05T23:24:15.000Z",
  "title": "An observable measure of entanglement for pure states of multi-qubit systems",
  "authors": [
    "Gavin K. Brennen"
  ],
  "comment": "8 pages, 2 figures",
  "journal": "Quantum Information and Computation, vol. 3 (6), 619-626 (2003)",
  "categories": [
    "quant-ph"
  ],
  "abstract": "Recently, Meyer and Wallach [D.A. Meyer and N.R. Wallach (2002), J. of Math. Phys., 43, pp. 4273] proposed a measure of multi-qubit entanglement that is a function on pure states. We find that this function can be interpreted as a physical quantity related to the average purity of the constituent qubits and show how it can be observed in an efficient manner without the need for full quantum state tomography. A possible realization is described for measuring the entanglement of a chain of atomic qubits trapped in a 3D optical lattice.",
  "revisions": [
    {
      "version": "v3",
      "updated": "2003-11-05T23:24:15.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "pure states",
      "multi-qubit systems",
      "observable measure",
      "full quantum state tomography",
      "multi-qubit entanglement"
    ],
    "tags": [
      "journal article"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 8,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2003quant.ph..5094B"
    }
  }
}