Observation of 65 GHz Coherent Oscillation in a Superconducting Flux Qubit Manipulated by Pulses

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-Zene...

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Bibliographic Details
Published in:Journal of physics. Conference series 2014-01, Vol.507 (4), p.42006-4
Main Authors: Chiarello, F, Carelli, P, Castellano, M G, Cosmelli, C, Torrioli, G
Format: Article
Language:English
Subjects:
Coherence
Evolution
Flux
High speed
Initial conditions
Oscillations
Physics
Quantum phenomena
Qubits (quantum computing)
Superconductivity
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Summary: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.
ISSN:1742-6596
1742-6588
1742-6596
DOI:10.1088/1742-6596/507/4/042006