Direct measurements of tunable Josephson plasma resonance in the L-SET
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Phase dynamics has been measured in a driven mesoscopic Josephson oscillator where the resonance is tuned either by magnetic flux or by gate charge modulation of the Josephson inductance. Phenomena are analyzed in terms of a "phase particle picture", and by numerical circuit simulations. An analogy to switching of a DC-biased junction into voltage state is discussed. Operation principle of the recently demonstrated Inductive Single-Electron transistor (L-SET) based on the driven oscillator is reviewed. The obtained charge sensitivity implies that a performance comparable to the best rf-SETs has already been reached with the novel device.
10 pages, submitted to proceedings of "IV International workshop on Macroscopic Quantum Coherence and Computing", Naples, June 2004
10 pages, submitted to proceedings of "IV International workshop on Macroscopic Quantum Coherence and Computing", Naples, June 2004