{
  "id": "1012.0565",
  "version": "v2",
  "published": "2010-12-02T20:51:53.000Z",
  "updated": "2011-11-14T17:34:47.000Z",
  "title": "Controllable anisotropic exchange coupling between spin qubits in quantum dots",
  "authors": [
    "Yun-Pil Shim",
    "Sangchul Oh",
    "Xuedong Hu",
    "Mark Friesen"
  ],
  "comment": "4 pages with 3 figures",
  "journal": "Phys. Rev. Lett. 106, 180503 (2011)",
  "doi": "10.1103/PhysRevLett.106.180503",
  "categories": [
    "cond-mat.mes-hall",
    "quant-ph"
  ],
  "abstract": "The exchange coupling between quantum dot spin qubits is isotropic, which restricts the types of quantum gates that can be formed. Here, we propose a method for controlling anisotropic interactions between spins arranged in a bus geometry. The symmetry is broken by an external magnetic field, resulting in XXZ-type interactions that can efficiently generate Greenberger-Horne-Zeilinger (GHZ) states or universal gate sets for exchange-only quantum computing. Analysis of the bus ground state provides a link between quantum critical phenomena and the communication capacity.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2011-11-14T17:34:47.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "03.67.Lx",
      "03.67.Hk",
      "73.21.La",
      "75.10.Pq"
    ],
    "keywords": [
      "controllable anisotropic exchange coupling",
      "quantum dot spin qubits",
      "bus ground state",
      "external magnetic field",
      "universal gate sets"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review Letters",
      "year": 2011,
      "month": "May",
      "volume": 106,
      "number": 18,
      "pages": 180503
    },
    "note": {
      "typesetting": "TeX",
      "pages": 4,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2011PhRvL.106r0503S"
    }
  }
}