{
  "id": "0708.1918",
  "version": "v3",
  "published": "2007-08-14T15:45:03.000Z",
  "updated": "2008-01-31T10:07:10.000Z",
  "title": "Quantum state tomography using a single apparatus",
  "authors": [
    "B. Mehmani",
    "A. E. Allahverdyan",
    "Th. M. Nieuwenhuizen"
  ],
  "comment": "7 pages, 8 figure, Phys. Rev. A",
  "doi": "10.1103/PhysRevA.77.032122",
  "categories": [
    "quant-ph",
    "cond-mat.stat-mech"
  ],
  "abstract": "The density matrix of a two-level system (spin, atom) is usually determined by measuring the three non-commuting components of the Pauli vector. This density matrix can also be obtained via the measurement data of two commuting variables, using a single apparatus. This is done by coupling the two-level system to a mode of radiation field, where the atom-field interaction is described with the Jaynes--Cummings model. The mode starts its evolution from a known coherent state. The unknown initial state of the atom is found by measuring two commuting observables: the population difference of the atom and the photon number of the field. We discuss the advantages of this setup and its possible applications.",
  "revisions": [
    {
      "version": "v3",
      "updated": "2008-01-31T10:07:10.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "03.65.Wj",
      "03.67.-a"
    ],
    "keywords": [
      "quantum state tomography",
      "single apparatus",
      "density matrix",
      "two-level system",
      "unknown initial state"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review A",
      "year": 2008,
      "month": "Mar",
      "volume": 77,
      "number": 3,
      "pages": "032122"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 7,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2008PhRvA..77c2122M"
    }
  }
}