Experimental Demonstration of an Oscillator Stabilized Josephson Flux Qubit
R. H. Koch, George Keefe, F. P. Milliken, John Rozen, C. C. Tsuei, J. R. Kirtley, David Peter Divincenzo · Physical Review Letters · 2006
We experimentally demonstrate the use of a superconducting transmission line, shorted at both ends, to stabilize the operation of a tunable flux qubit. Using harmonic-oscillator stabilization and pulsed dc operation, we have observed Larmor oscillations with a single shot visibility of 90%. In another qubit, the visibility was 60% and there was no measurable visibility reduction after 35 ns.