{
  "id": "1010.0472",
  "version": "v1",
  "published": "2010-10-04T04:13:51.000Z",
  "updated": "2010-10-04T04:13:51.000Z",
  "title": "Efficient tomography of quantum processes",
  "authors": [
    "Xiang-Bin Wang",
    "J. -Z. Hu",
    "Z. -W. Yu",
    "Franco Nori"
  ],
  "comment": "4 pages, 1 figure",
  "categories": [
    "quant-ph"
  ],
  "abstract": "We show with explicit formulas that one can completely identify an unknown quantum process with only one weakly entangled state; and identify a quantum optical Gaussian process with either one two-mode squeezed state or a few different coherent states. In tomography of a multi-mode process, our method reduces the number of different test states exponentially compared with existing methods.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2010-10-04T04:13:51.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "quantum processes",
      "efficient tomography",
      "unknown quantum process",
      "quantum optical gaussian process",
      "test states"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 4,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2010arXiv1010.0472W"
    }
  }
}