Full text loading...
(a) Washboard potential and the equivalent circuit (inset) of a current-biased Josephson tunnel junction with . is the effective shunt resistance of Josephson junction embedded in the bias circuitry. (b) Schematic time profiles for measuring the escape time of a Josephson junction subjected to a microwave irradiation.
Lifetime of zero-voltage state with and without microwave irradiation at . The squares are measured lifetimes without microwave. The determined from the best fit is . The other curves are the measured lifetimes with microwave. The microwave frequency are , 19.9, 19.8, 19.7, and , respectively. And each curve has a maximum (indicated by arrows) at different where .
Simulation results of the reduced lifetime of zero-voltage state vs normalized bias current, where is the plasma frequency at zero bias current.
at different , from which , systematic error , and relative error are obtained.
Article metrics loading...