Quantum jumps between macroscopic quantum states of a superconducting qubit coupled to a microscopic two-level system.
We report the observation of quantum jumps between macroscopic quantum states in a superconducting phase qubit coupled to the two-level systems in the Josephson tunnel junction, and all key features of quantum jumps are confirmed in the experiments. Moreover, quantum jumps can be used to calibrate such two-level systems, which are believed to be one of the main decoherence sources in Josephson devices.
Yu
Yang
Y
National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing, China. yuyang@nju.edu.cn
Zhu
Shi-Liang
SL
Sun
Guozhu
G
Wen
Xueda
X
Dong
Ning
N
Chen
Jian
J
Wu
Peiheng
P
Han
Siyuan
S