{
  "id": "0712.4033",
  "version": "v3",
  "published": "2007-12-24T21:47:11.000Z",
  "updated": "2008-10-20T04:33:08.000Z",
  "title": "Measurement of Temporal Correlations of the Overhauser Field in a Double Quantum Dot",
  "authors": [
    "D. J. Reilly",
    "J. M. Taylor",
    "E. A. Laird",
    "J. R. Petta",
    "C. M. Marcus",
    "M. P. Hanson",
    "A. C. Gossard"
  ],
  "comment": "related papers available at http://marcuslab.harvard.edu",
  "journal": "Phys. Rev. Lett. 101, 236803 (2008).",
  "doi": "10.1103/PhysRevLett.101.236803",
  "categories": [
    "cond-mat.mes-hall",
    "cond-mat.stat-mech"
  ],
  "abstract": "In quantum dots made from materials with nonzero nuclear spins, hyperfine coupling creates a fluctuating effective Zeeman field (Overhauser field) felt by electrons, which can be a dominant source of spin qubit decoherence. We characterize the spectral properties of the fluctuating Overhauser field in a GaAs double quantum dot by measuring correlation functions and power spectra of the rate of singlet-triplet mixing of two separated electrons. Away from zero field, spectral weight is concentrated below 10 Hz, with 1/f^2 dependence on frequency, f. This is consistent with a model of nuclear spin diffusion, and indicates that decoherence can be largely suppressed by echo techniques.",
  "revisions": [
    {
      "version": "v3",
      "updated": "2008-10-20T04:33:08.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "73.21.La",
      "03.67.Lx",
      "73.63.Kv"
    ],
    "keywords": [
      "overhauser field",
      "temporal correlations",
      "measurement",
      "nuclear spin diffusion",
      "nonzero nuclear spins"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review Letters",
      "year": 2008,
      "month": "Dec",
      "volume": 101,
      "number": 23,
      "pages": 236803
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2008PhRvL.101w6803R"
    }
  }
}