{
  "id": "1003.0897",
  "version": "v1",
  "published": "2010-03-03T21:00:11.000Z",
  "updated": "2010-03-03T21:00:11.000Z",
  "title": "Electric g Tensor Control and Spin Echo of a Hole-Spin Qubit in a Quantum Dot Molecule",
  "authors": [
    "Robert Roloff",
    "Thomas Eissfeller",
    "Peter Vogl",
    "Walter Pötz"
  ],
  "comment": "11 pages, 6 figures, revtex4",
  "journal": "New J. Phys. 12, 093012 (2010)",
  "categories": [
    "cond-mat.mes-hall",
    "quant-ph"
  ],
  "abstract": "The feasibility of high-fidelity single-qubit operations of a hole spin in a quantum dot molecule by electric g tensor control is demonstrated. Apart from a constant external magnetic field the proposed scheme allows for an exclusively electric control of the hole spin. Realistic electric gate bias profiles are identified for various qubit operations using process-tomography-based optimal control. They are shown to be remarkably robust against decoherence and dissipation arising from the interaction of the hole with host-lattice nuclear spins and phonons, with a fidelity loss of $\\approx$ 1 percent for gate operation times of $\\approx 10$ ns. Spin-echo experiments for the hole spin are modeled to explore dephasing mechanisms and the role of pulse-timing imperfections on the gate fidelity loss is discussed.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2010-03-03T21:00:11.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "quantum dot molecule",
      "tensor control",
      "spin echo",
      "hole-spin qubit",
      "hole spin"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1088/1367-2630/12/9/093012",
      "journal": "New Journal of Physics",
      "year": 2010,
      "month": "Sep",
      "volume": 12,
      "number": 9,
      "pages": "093012"
    },
    "note": {
      "typesetting": "RevTeX",
      "pages": 11,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2010NJPh...12i3012R"
    }
  }
}