Open AccessObservation of 65 GHz Coherent Oscillation in a Superconducting Flux Qubit Manipulated by Pulses
Author(s) -
F. Chiarello,
P. Carelli,
M. G. Castellano,
C. Cosmelli,
G. Torrioli
Publication year - 2014
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/507/4/042006
Subject(s) - flux qubit , qubit , superconductivity , oscillation (cell signaling) , phase qubit , physics , flux (metallurgy) , charge qubit , condensed matter physics , quantum mechanics , quantum , materials science , chemistry , biochemistry , metallurgy
A superconducting flux qubit can be manipulated by a fast modification of its potential, with a rapid transition from a double well to a single well shape, and coming back to the initial condition. This mechanism is based on a non-trivial quantum phenomenon, involving "partial" Landau-Zener transitions, coherent evolution in an harmonic potential and quantum interference. The study of this system enables a deep insight in decoherence mechanisms typical of superconducting qubits. Moreover, this procedure allows quantum operations with extreme high speeds, not possible with other standard manipulations. We present the experimental observation of coherent oscillations showing tunable frequencies with a 65 GHz top value. © Published under licence by IOP Publishing Ltd