{
  "id": "cond-mat/0605576",
  "version": "v2",
  "published": "2006-05-23T15:20:55.000Z",
  "updated": "2007-02-06T10:43:15.000Z",
  "title": "Universal set of quantum gates for double-dot spin qubits with fixed interdot coupling",
  "authors": [
    "Ronald Hanson",
    "Guido Burkard"
  ],
  "comment": "5 pages, 4 figures; final version v2 (minor changes)",
  "journal": "Phys. Rev. Lett. 98, 050502 (2007)",
  "doi": "10.1103/PhysRevLett.98.050502",
  "categories": [
    "cond-mat.mes-hall",
    "quant-ph"
  ],
  "abstract": "We propose a set of universal gate operations for the singlet-triplet qubit realized by two electron spins in a double quantum dot, in the presence of a fixed inhomogeneous magnetic field. All gate operations are achieved by switching the potential offset between the two dots with an electrical bias, and do not require time-dependent control of the tunnel coupling between the dots. We analyze the two-electron dynamics and calculate the effective qubit rotation angle as a function of the applied electric bias. We present explicit gate sequences for single-qubit rotations about two orthogonal axes, and a CNOT gate sequence, completing the universal gate set.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2007-02-06T10:43:15.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "double-dot spin qubits",
      "fixed interdot coupling",
      "quantum gates",
      "universal set",
      "universal gate operations"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. Lett."
    },
    "note": {
      "typesetting": "TeX",
      "pages": 5,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}