Thermal escape from a metastable state in periodically driven Josephson junctions.
Resonant activation and noise-enhanced stability were observed in an underdamped real physical system, i.e., Josephson tunnel junctions. With a weak sinusoidal driving force applied, the thermal activated escape from a potential well underwent resonancelike behaviors as a function of the driving frequency. The resonances also crucially depended on the initial condition of the system. Numerical simulations showed good agreement with the experimental results.
Sun
Guozhu
G
Research Institute of Superconductor Electronics, Department of Electronic Science and Engineering, Nanjing University, Nanjing, 210093, China.
Dong
Ning
N
Mao
Guangfeng
G
Chen
Jian
J
Xu
Weiwei
W
Ji
Zhengming
Z
Kang
Lin
L
Wu
Peiheng
P
Yu
Yang
Y
Xing
Dingyu
D