Enhanced Macroscopic Quantum Tunneling in Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$ Intrinsic Josephson Junction Stacks

X. Y. Jin, J. Lisenfeld, Y. Koval +3

We have investigated macroscopic quantum tunneling in Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$ intrinsic Josephson junctions at millikelvin temperatures using microwave irradiation. Measureme…