{
  "id": "1905.01206",
  "version": "v1",
  "published": "2019-05-03T14:41:26.000Z",
  "updated": "2019-05-03T14:41:26.000Z",
  "title": "Superconducting circuit protected by two-Cooper-pair tunneling",
  "authors": [
    "W. C. Smith",
    "A. Kou",
    "X. Xiao",
    "U. Vool",
    "M. H. Devoret"
  ],
  "comment": "14 pages, 6 figures",
  "categories": [
    "quant-ph",
    "cond-mat.mes-hall"
  ],
  "abstract": "We present a protected superconducting qubit based on an effective circuit element that only allows pairs of Cooper pairs to tunnel. These dynamics give rise to a nearly degenerate ground state manifold indexed by the parity of tunneled Cooper pairs. We show that, when the circuit element is shunted by a large capacitance, this manifold can be used as a logical qubit that we expect to be insensitive to multiple relaxation and dephasing mechanisms.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2019-05-03T14:41:26.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "superconducting circuit",
      "two-cooper-pair tunneling",
      "degenerate ground state manifold",
      "effective circuit element",
      "tunneled cooper pairs"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 14,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}