{
  "id": "1303.3819",
  "version": "v1",
  "published": "2013-03-15T16:15:44.000Z",
  "updated": "2013-03-15T16:15:44.000Z",
  "title": "Stabilizing a Bell state of two superconducting qubits by dissipation engineering",
  "authors": [
    "Z. Leghtas",
    "U. Vool",
    "S. Shankar",
    "M. Hatridge",
    "S. M. Girvin",
    "M. H. Devoret",
    "M. Mirrahimi"
  ],
  "comment": "5 pages, 4 figures",
  "journal": "Phys. Rev. A 88, 023849 (2013)",
  "doi": "10.1103/PhysRevA.88.023849",
  "categories": [
    "quant-ph"
  ],
  "abstract": "We propose a dissipation engineering scheme that prepares and protects a maximally entangled state of a pair of superconducting qubits. This is done by off-resonantly coupling the two qubits to a low-Q cavity mode playing the role of a dissipative reservoir. We engineer this coupling by applying six continuous-wave microwave drives with appropriate frequencies. The two qubits need not be identical. We show that our approach does not require any fine-tuning of the parameters and requires only that certain ratios between them be large. With currently achievable coherence times, simulations indicate that a Bell state can be maintained over arbitrary long times with fidelities above 94%. Such performance leads to a significant violation of Bell's inequality (CHSH correlation larger than 2.6) for arbitrary long times.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2013-03-15T16:15:44.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "42.50.Dv",
      "03.65.Yz",
      "42.50.Pq",
      "85.25.-j"
    ],
    "keywords": [
      "bell state",
      "superconducting qubits",
      "arbitrary long times",
      "chsh correlation larger",
      "continuous-wave microwave drives"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review A",
      "year": 2013,
      "month": "Aug",
      "volume": 88,
      "number": 2,
      "pages": "023849"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 5,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2013PhRvA..88b3849L"
    }
  }
}