{
  "id": "0808.1979",
  "version": "v3",
  "published": "2008-08-14T12:31:32.000Z",
  "updated": "2009-03-25T12:44:42.000Z",
  "title": "$π$-junction qubit in monolayer graphene",
  "authors": [
    "Colin Benjamin",
    "Jiannis K. Pachos"
  ],
  "comment": "5 pages, 5 figures, Manuscript revised, Accepted for publication in Phys. Rev. B",
  "journal": "Phys. Rev. B 79, 155431 (2009)",
  "doi": "10.1103/PhysRevB.79.155431",
  "categories": [
    "cond-mat.mes-hall",
    "cond-mat.mtrl-sci",
    "quant-ph"
  ],
  "abstract": "We propose to combine the advantages of graphene, such as easy tunability and long coherence times, with Josephson physics to manufacture qubits. If these qubits are built around a 0 and $\\pi$ junction they can be controlled by an external flux. Alternatively, a d-wave Josephson junction can itself be tuned via a gate voltage to create superpositions between macroscopically degenerate states. We show that ferromagnets are not required for realizing $\\pi$ junction in graphene, thus considerably simplifying its physical implementation. We demonstrate how one qubit gates, such as arbitrary phase rotations and the exchange gate, can be implemented.",
  "revisions": [
    {
      "version": "v3",
      "updated": "2009-03-25T12:44:42.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "73.23.-b",
      "03.65.Ud",
      "72.70.+m",
      "74.45.+c"
    ],
    "keywords": [
      "monolayer graphene",
      "junction qubit",
      "arbitrary phase rotations",
      "d-wave josephson junction",
      "long coherence times"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review B",
      "year": 2009,
      "month": "Apr",
      "volume": 79,
      "number": 15,
      "pages": 155431
    },
    "note": {
      "typesetting": "TeX",
      "pages": 5,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2009PhRvB..79o5431B"
    }
  }
}