Observation of Transition from Escape Dynamics to Underdamped Phase Diffusion in a Josephson Junction
Observation of Transition from Escape Dynamics to Underdamped Phase Diffusion in a Josephson Junction
We have investigated the dynamics of underdamped Josephson junctions. In addition to the usual crossover between macroscopic quantum tunnelling and thermally activated (TA) behaviour we observe in our samples with relatively small Josephson coupling E_J, for the first time, the transition from TA behaviour to underdamped phase diffusion. Above the …