{
  "id": "quant-ph/9908081",
  "version": "v1",
  "published": "1999-08-27T20:11:21.000Z",
  "updated": "1999-08-27T20:11:21.000Z",
  "title": "Non-maximally entangled states: production, characterization and utilization",
  "authors": [
    "Andrew G. White",
    "Daniel F. V. James",
    "Philippe H. Eberhard",
    "Paul G. Kwiat"
  ],
  "comment": "4 pages, 4 figures. To appear in Phys. Rev. Lett",
  "journal": "Physical Review Letters 83, no. 16, pp. 3103-3107 (1999)",
  "doi": "10.1103/PhysRevLett.83.3103",
  "categories": [
    "quant-ph"
  ],
  "abstract": "Using a spontaneous-downconversion photon source, we produce true non-maximally entangled states, i.e., without the need for post-selection. The degree and phase of entanglement are readily tunable, and are characterized both by a standard analysis using coincidence minima, and by quantum state tomography of the two-photon state. Using the latter, we experimentally reconstruct the reduced density matrix for the polarization. Finally, we use these states to measure the Hardy fraction, obtaining a result that is $122 \\sigma$ from any local-realistic result.",
  "revisions": [
    {
      "version": "v1",
      "updated": "1999-08-27T20:11:21.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "characterization",
      "utilization",
      "production",
      "produce true non-maximally entangled states",
      "quantum state tomography"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. Lett."
    },
    "note": {
      "typesetting": "TeX",
      "pages": 4,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}