Underdamped Josephson junction as a switching current detector

被引：49
|
作者：
Oelsner, G. [1 ]
Revin, L. S. [2 ,3 ]
Il'ichev, E. [1 ,4 ]
Pankratov, A. L. [2 ,3 ]
Meyer, H. -G. [1 ]
Groenberg, L. [5 ]
Hassel, J. [5 ]
Kuzmin, L. S. [3 ,6 ]
机构：
[1] Inst Photon Technol IPHT, D-07702 Jena, Germany
[2] RAS, Inst Phys Microstruct, Nizhnii Novgorod 603950, Russia
[3] Nizhnii Novgorod State Tech Univ, Lab Cryogen Nanoelect, Nizhnii Novgorod, Russia
[4] Novosibirsk State Tech Univ, Novosibirsk 630092, Russia
[5] VTT Tech Res Ctr Finland, FI-02044 Espoo, Finland
[6] Chalmers Univ Technol, SE-41296 Gothenburg, Sweden
来源：
APPLIED PHYSICS LETTERS | 2013年 / 103卷 / 14期
关键词：
QUANTUM; DYNAMICS; DISSIPATION; DIFFUSION;
D O I：
10.1063/1.4824308
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We demonstrate the narrow switching distribution of an underdamped Josephson junction from the zero to the finite voltage state at millikelvin temperatures. We argue that such junctions can be used as ultrasensitive detectors of the single photons in the GHz range, operating close to the quantum limit: a given initial (zero voltage) state can be driven by an incoming signal to the finite voltage state. The width of the switching distribution at a nominal temperature of about T = 10 mK was 4.5 nA, which corresponds to an effective noise temperature of the device below 60 mK. (C) 2013 AIP Publishing LLC.
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页数：3
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