约瑟夫逊结中热涨落效应的研究

Effect of Thermal Fluctuation in Josephson Junction

讨论了O-U噪声对约瑟夫逊结中伏安特性的影响,结果表明,当考虑热涨落效应时,伏安特性曲线出现“圆拱化”现象;随噪声关联时间增大,零压电流增大,当热涨落参量减小到一定值时,伏安特性曲线中的“圆拱化”现象消失。

The effect of O-U noise on volt-ampere properties in Josephson Junction is discussed. The result shows that when thermal fluctuation effect is considered, the curve of volt-ampere property is rounded, with the increase of noise correlation time, zero-voltage current increases, but when the thermal fluctuation parameter reduces to half of it. The rounding in volt-ampere curve vanishes.