{
  "id": "1508.02107",
  "version": "v1",
  "published": "2015-08-10T02:23:34.000Z",
  "updated": "2015-08-10T02:23:34.000Z",
  "title": "Mechanically induced two-qubit gates and maximally entangled states for single electron spins in a carbon nanotube",
  "authors": [
    "Heng Wang",
    "Guido Burkard"
  ],
  "comment": "9 pages, 7 figures",
  "categories": [
    "cond-mat.mes-hall",
    "quant-ph"
  ],
  "abstract": "We theoretically analyze a system where two electrons are trapped separately in two quantum dots on a suspended carbon nanotube (CNT), subject to external ac electric driving. An indirect mechanically-induced coupling of two distant single electron spins is induced by the interaction between the spins and the mechanical motion of the CNT. We show that a two-qubit iSWAP gate and arbitrary single-qubit gates can be obtained from the intrinsic spin-orbit coupling. Combining the iSWAP gate and single-qubit gates, maximally entangled states of two spins can be generated in a single step by varying the frequency and the strength of the external electric driving field. The spin-phonon coupling can be turned off by electrostatically shifting the electron wave function on the nanotube.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2015-08-10T02:23:34.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "mechanically induced two-qubit gates",
      "maximally entangled states",
      "carbon nanotube",
      "distant single electron spins",
      "single-qubit gates"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 9,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}