{
  "id": "1208.5015",
  "version": "v2",
  "published": "2012-08-24T17:34:57.000Z",
  "updated": "2013-03-14T09:29:26.000Z",
  "title": "Quantum state tomography by continuous measurement and compressed sensing",
  "authors": [
    "A. Smith",
    "C. A. Riofrío",
    "B. E. Anderson",
    "H. Sosa-Martinez",
    "I. H. Deutsch",
    "P. S. Jessen"
  ],
  "journal": "Physical Review A 87, 030102(R) (2013)",
  "doi": "10.1103/PhysRevA.87.030102",
  "categories": [
    "quant-ph"
  ],
  "abstract": "The need to perform quantum state tomography on ever larger systems has spurred a search for methods that yield good estimates from incomplete data. We study the performance of compressed sensing (CS) and least squares (LS) estimators in a fast protocol based on continuous measurement on an ensemble of cesium atomic spins. Both efficiently reconstruct nearly pure states in the 16-dimensional ground manifold, reaching average fidelities FCS = 0.92 and FLS = 0.88 using similar amounts of incomplete data. Surprisingly, the main advantage of CS in our protocol is an increased robustness to experimental imperfections.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2013-03-14T09:29:26.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "03.65.Wj",
      "42.50.Dv",
      "03.67.-a"
    ],
    "keywords": [
      "continuous measurement",
      "compressed sensing",
      "incomplete data",
      "perform quantum state tomography",
      "reaching average fidelities fcs"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review A",
      "year": 2013,
      "month": "Mar",
      "volume": 87,
      "number": 3,
      "pages": "030102"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2013PhRvA..87c0102S"
    }
  }
}