Rapid single-flux quantum control of the energy potential in a double SQUID qubit circuit (Articolo in rivista)

Type
Label
  • Rapid single-flux quantum control of the energy potential in a double SQUID qubit circuit (Articolo in rivista) (literal)
Anno
  • 2007-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1088/0953-2048/20/6/003 (literal)
Alternative label
  • M. G. Castellano; F. Chiarello; R. Leoni; G. Torrioli; P. Carelli; C. Cosmelli; M. Khabipov; A. B. Zorin; D. Balashov (2007)
    Rapid single-flux quantum control of the energy potential in a double SQUID qubit circuit
    in Superconductor science and technology (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • M. G. Castellano; F. Chiarello; R. Leoni; G. Torrioli; P. Carelli; C. Cosmelli; M. Khabipov; A. B. Zorin; D. Balashov (literal)
Pagina inizio
  • 500 (literal)
Pagina fine
  • 505 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://iopscience.iop.org/0953-2048/20/6/003/ (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 20 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 6 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • 1 Istituto di Fotonica e Nanotecnologie, CNR, via Cineto Romano 42, I-00156 Roma, Italy 2 Dipartimento di Ingegneria Elettrica e dell'Informazione, Università dell'Aquila, Monteluco di Roio, I-67040 L'Aquila, Italy 3 Dipartimento di Fisica, Università di Roma 'La Sapienza', Piazzale Aldo Moro 5, I-00185 Roma, Italy 4 Physikalisch-Technische Bundesanstalt, Bundesallee 100, D-38116 Braunschweig, Germany (literal)
Titolo
  • Rapid single-flux quantum control of the energy potential in a double SQUID qubit circuit (literal)
Abstract
  • We report on the development and test of an integrated system composed of a flux qubit and a rapid single- flux quantum ( RSFQ) circuit that allows qubit manipulation. The goal is to demonstrate the feasibility of control electronics integrated on the same chip as the qubit, in view of the application in quantum computation with superconducting devices. RSFQ logic relies on the storage and transmission of magnetic flux quanta and can be profitably used with superconducting qubits because of the speed, scalability, compatibility with the qubit fabrication process and low temperature environment. While standard RSFQ circuitry is well assessed, the application to quantum computing requires a complete rescaling of parameter values, in order to preserve the qubit coherence and reduce the power dissipation. In the system presented in this paper, the qubit role is played by a superconducting loop interrupted by a small dc SQUID, usually called a double SQUID, which behaves as a tunable rf- SQUID. Its energy potential has the shape of a double well, with the barrier between the wells controlled by magnetic flux applied to the inner dc SQUID. Here for the first time we report measurements at a base temperature of 370 mK in which flux control pulses with desired characteristics were supplied by a RSFQ circuit fabricated using non- standard parameters in the same chip as the qubit. (literal)
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