{
  "id": "1310.8529",
  "version": "v3",
  "published": "2013-10-31T14:45:10.000Z",
  "updated": "2014-03-27T19:04:19.000Z",
  "title": "Observation of quantum jumps of a single quantum dot spin using sub-microsecond single-shot optical readout",
  "authors": [
    "Aymeric Delteil",
    "Wei-bo Gao",
    "Parisa Fallahi",
    "Javier Miguel-Sanchez",
    "Atac Imamoglu"
  ],
  "comment": "5 pages, 3 figures",
  "journal": "Phys. Rev. Lett. 112, 116802 (2014)",
  "doi": "10.1103/PhysRevLett.112.116802",
  "categories": [
    "cond-mat.mes-hall",
    "quant-ph"
  ],
  "abstract": "Single-shot read-out of individual qubits is typically the slowest process among the elementary single- and two-qubit operations required for quantum information processing. Here, we use resonance fluorescence from a single-electron charged quantum dot to read-out the spin-qubit state in 800 nanoseconds with a fidelity exceeding 80%. Observation of the spin evolution on longer timescales reveals quantum jumps of the spin state: we use the experimentally determined waiting-time distribution to characterize the quantum jumps. Embedding a quantum dot in a photonic nanostructure could be used to enhance the collection efficiency by a factor of 10, enabling single-shot read-out with a fidelity exceeding 97%.",
  "revisions": [
    {
      "version": "v3",
      "updated": "2014-03-27T19:04:19.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "73.21.La",
      "03.67.Lx",
      "42.50.-p"
    ],
    "keywords": [
      "single quantum dot spin",
      "sub-microsecond single-shot optical readout",
      "quantum jumps",
      "observation",
      "single-shot read-out"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review Letters",
      "year": 2014,
      "month": "Mar",
      "volume": 112,
      "number": 11,
      "pages": 116802
    },
    "note": {
      "typesetting": "TeX",
      "pages": 5,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2014PhRvL.112k6802D"
    }
  }
}