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arXiv 2108.08256cond-mat.supr-con
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噪声增强热激活引起的约瑟夫森结低温开关电流分布

Switching Current Distributions in Josephson Junctions at Low Temperatures Resulting From Noise Enhanced Thermal Activation

James A. Blackburn

摘要:

约瑟夫森结中开关电流分布的实验是研究结突然转变为有限电压态的机理的灵敏探针。在低温下的数据表现出平滑和逐渐偏离的期望的经典理论的热激活的障碍在倾斜的搓衣板电位。在本文中,它表明,如果一个非常小的比例的噪声能量进入装置在室温下生存过滤,并达到样品,它可以提高逃逸率足以复制的开关偏置的温度依赖性的实验观察。这一猜想成功地测试对已发表的实验数据。

英文摘要:

Experiments on the distributions of switching currents in Josephson junctions are sensitive probes of the mechanism by which a junction changes abruptly to a finite voltage state. At low temperatures data exhibit smooth and gradual deviations from the expectations of the classical theory of thermal activation over the barrier in the tilted washboard potential. In this paper it is shown that if a very small proportion of the noise energy entering the apparatus at room temperature survives filtering and reaches the sample, it can enhance the escape rate sufficiently to replicate experimental observations of the temperature dependence of the switching bias. This conjecture is successfully tested against published experimental data.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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