Feedback and rate asymmetry of the Josephson junction noise detector

被引：11
|
作者：
Urban, D. F. [1 ]
Grabert, Hermann
机构：
[1] Univ Freiburg, Inst Phys, D-79104 Freiburg, Germany
来源：
PHYSICAL REVIEW B | 2009年 / 79卷 / 11期
关键词：
Josephson effect; superconducting device noise; superconducting junction devices; IRREVERSIBLE-PROCESSES; COUNTING STATISTICS; FLUCTUATIONS; CONDUCTORS;
D O I：
10.1103/PhysRevB.79.113102
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The Josephson junction noise detector measures the skewness of non-Gaussian noise via the asymmetry of the rate of escape from the zero-voltage state upon reversal of the bias current. The feedback of this detector on the noise generating device is investigated in detail. Concise predictions are made for a second Josephson junction as noise generating device. The strong nonlinearity of this component implies particularly strong feedback effects, including a change in sign of the rate asymmetry as the applied voltage approaches twice the superconducting gap.
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页数：4
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