Quantum Phase Diffusion in a Small Underdamped Josephson Junction

H. F. Yu, X. B. Zhu, Z. H. Peng +8

Quantum phase diffusion in a small underdamped Nb/AlO${}_x$/Nb junction ($\sim$ 0.4 $\mu$m${}^2$) is demonstrated in a wide temperature range of 25-140 mK where macroscopic quantum tunne…