Analysis Theory of Asymmetric dc SQUID Driven by
Thermal Noises
L(U) Hai-Feng; JIA Ya; HUANG Xin-Tang
【期刊名称】《《理论物理通讯（英文版）》》 【年(卷),期】2004(041)005
【摘要】An analysis expression for the stationary probability distribution of asymmetric superconducting quantum interference device with two Josephson junctions (dc SQUID) driven by thermal noise is derived from two-dimensional Fokker-Planck equation, where the potential condition is satisfied. Two of the three asymmetric parameters, inductance asymmetric parameter η and critical current asymmetric parameter α, can be changed in this condition, but resistance asymmetric parameter ρ cannot be changed. The \phenomenon of circulating current can disappear with the change of coefficient α. The effects of asymmetric parameters on current-voltage relationship and transfer function of dc SQUID system are also represented. 【总页数】8页(707-714)
【关键词】noise; Fokker-Planck equation; superconducting quantum interference device
【作者】L(U) Hai-Feng; JIA Ya; HUANG Xin-Tang
【作者单位】Department of Physics Central China Normal University Wuhan 430079 China
Analysis Theory of Asymmetric dc SQUID Driven by Thermal Noises
