Noise-Induced Hopping in an RF SQUID

Author

Jiquan Zhai ; Zhican Du ; Yu Zhou ; Jianxin Shi ; Weiwei Xu ; Guozhu Sun ; Lin Kang ; Jian Chen ; Peiheng Wu

Author_Institution

Res. Inst. of Supercond. Electron., Nanjing Univ., Nanjing, China

Volume

25

Issue

3

fYear

2015

fDate

Jun-15

Firstpage

1

Lastpage

4

Abstract

An RF superconducting quantum interference device (RF SQUID), which is an important bistable system, has attracted much attention for its important applications in nonlinear fields. With different potential shapes at 20 mK, we perform detailed research on the relationship between the probability of the phase particle in the left potential well (P_L) of an RF SQUID and the external noise intensity (D), which provides a method to identify the symmetry of any tunable bistable systems. A qualitative model is proposed to understand the physical process, and the numerical results are well consistent with the experimental results.

Keywords

SQUIDs; superconducting device noise; RF superconducting quantum interference device; external noise intensity; left potential well; noise-induced hopping; nonlinear fields; phase particle probability; physical process; potential shapes; qualitative model; temperature 20 mK; tunable bistable system symmetry; Noise; Physics; Potential well; SQUIDs; Shape; Stochastic resonance; Trajectory; Double well; noise-induced hopping; radio-frequency superconducting quantum interference device (RF SQUID); symmetry of potential well;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2014.2359766

Filename

6907976