{
  "id": "cond-mat/0510177",
  "version": "v2",
  "published": "2005-10-07T10:12:18.000Z",
  "updated": "2006-03-13T12:13:56.000Z",
  "title": "Nuclear spin state narrowing via gate--controlled Rabi oscillations in a double quantum dot",
  "authors": [
    "D. Klauser",
    "W. A. Coish",
    "Daniel Loss"
  ],
  "comment": "v1:9 pages, 1 figure; v2: 13 pages, 2 figures, added section on measurement, to appear in Phys. Rev. B",
  "journal": "Phys. Rev. B 73, 205302 (2006)",
  "doi": "10.1103/PhysRevB.73.205302",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "We study spin dynamics for two electrons confined to a double quantum dot under the influence of an oscillating exchange interaction. This leads to driven Rabi oscillations between the $\\ket{\\uparrow\\downarrow}$--state and the $\\ket{\\downarrow\\uparrow}$--state of the two--electron system. The width of the Rabi resonance is proportional to the amplitude of the oscillating exchange. A measurement of the Rabi resonance allows one to narrow the distribution of nuclear spin states and thereby to prolong the spin decoherence time. Further, we study decoherence of the two-electron states due to the hyperfine interaction and give requirements on the parameters of the system in order to initialize in the $\\ket{\\uparrow\\downarrow}$--state and to perform a $\\sqrt{\\mathrm{SWAP}}$ operation with unit fidelity.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2006-03-13T12:13:56.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "double quantum dot",
      "nuclear spin state narrowing",
      "gate-controlled rabi oscillations",
      "rabi resonance",
      "oscillating exchange"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. B"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 9,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}