{
  "id": "cond-mat/0304166",
  "version": "v2",
  "published": "2003-04-07T19:44:56.000Z",
  "updated": "2003-07-28T11:27:31.000Z",
  "title": "Variable electrostatic transformer: controllable coupling of two charge qubits",
  "authors": [
    "D. V. Averin",
    "C. Bruder"
  ],
  "comment": "final version, to appear in Phys. Rev. Lett",
  "journal": "Phys. Rev. Lett. 91, 057003 (2003).",
  "doi": "10.1103/PhysRevLett.91.057003",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "We propose and investigate a novel method for the controlled coupling of two Josephson charge qubits by means of a variable electrostatic transformer. The value of the coupling capacitance is given by the discretized curvature of the lowest energy band of a Josephson junction, which can be positive, negative, or zero. We calculate the charging diagram of the two-qubit system that reflects the transition from positive to negative through vanishing coupling. We also discuss how to construct a phase gate making use of the controllable coupling.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2003-07-28T11:27:31.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "variable electrostatic transformer",
      "controllable coupling",
      "josephson charge qubits",
      "lowest energy band",
      "phase gate"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. Lett."
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}