{
  "id": "1011.6148",
  "version": "v1",
  "published": "2010-11-29T08:16:41.000Z",
  "updated": "2010-11-29T08:16:41.000Z",
  "title": "Quantum dynamics of a dc-SQUID coupled to an asymmetric Cooper pair transistor",
  "authors": [
    "A. Fay",
    "W. Guichard",
    "O. Buisson",
    "F. W. J. Hekking"
  ],
  "comment": "20 pages",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "We present a theoretical analysis of the quantum dynamics of a superconducting circuit based on a highly asymmetric Cooper pair transistor (ACPT) in parallel to a dc-SQUID. Starting from the full Hamiltonian we show that the circuit can be modeled as a charge qubit (ACPT) coupled to an anharmonic oscillator (dc-SQUID). Depending on the anharmonicity of the SQUID, the Hamiltonian can be reduced either to one that describes two coupled qubits or to the Jaynes-Cummings Hamiltonian. Here the dc-SQUID can be viewed as a tunable micron-size resonator. The coupling term, which is a combination of a capacitive and a Josephson coupling between the two qubits, can be tuned from the very strong- to the zero-coupling regimes. It describes very precisely the tunable coupling strength measured in this circuit and explains the 'quantronium' as well as the adiabatic quantum transfer read-out.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2010-11-29T08:16:41.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "quantum dynamics",
      "highly asymmetric cooper pair transistor",
      "adiabatic quantum transfer read-out",
      "full hamiltonian"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 20,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2010arXiv1011.6148F"
    }
  }
}