Measuring non-Gaussian fluctuations through incoherent Cooper-pair current -: art. no. 247005

被引：40
|
作者：
Heikkilä, TT
Virtanen, P
Johansson, G
Wilhelm, FK
机构：
[1] Low Temp Lab, FIN-02015 Espoo, Finland
[2] Univ Basel, Dept Phys & Astron, CH-4056 Basel, Switzerland
[3] Univ Karlsruhe, Inst Theoret Festkorperphys, D-76128 Karlsruhe, Germany
[4] Chalmers Univ Technol, S-41296 Gothenburg, Sweden
[5] Univ Munich, Dept Phys, D-80333 Munich, Germany
[6] Univ Munich, CeNS, D-80333 Munich, Germany
来源：
PHYSICAL REVIEW LETTERS | 2004年 / 93卷 / 24期
关键词：
D O I：
10.1103/PhysRevLett.93.247005
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We study a Josephson junction (JJ) in the regime of incoherent Cooper-pair tunneling, capacitively coupled to a nonequilibrium noise source. The current-voltage (I-V) characteristics of the JJ are sensitive to the excess voltage fluctuations in the source, and can thus be used for wideband noise detection. Under weak driving, the odd part of the I-V can be related to the second cumulant of noise, whereas the even part is due to the third cumulant. After calibration, one can measure the Fano factors for the noise source, and get information about the frequency dependence of the noise.
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页数：4
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