Underdamped Josephson junction as a switching current detector
Journal article, 2013
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.
Author
G. Oelsner
Leibniz Association
L. S. Revin
Nizhny Novgorod State Technical University
Russian Academy of Sciences
E. Il'Ichev
Leibniz Association
Novosibirsk State Technical University
A. L. Pankratov
Nizhny Novgorod State Technical University
Russian Academy of Sciences
H. G. Meyer
Leibniz Association
L. Gronberg
Technical Research Centre of Finland (VTT)
J. Hassel
Technical Research Centre of Finland (VTT)
Leonid Kuzmin
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics
Applied Physics Letters
0003-6951 (ISSN) 1077-3118 (eISSN)
Vol. 103 14 142605Subject Categories (SSIF 2011)
Other Engineering and Technologies
DOI
10.1063/1.4824308