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Underdamped Josephson junction as a switching current detector

G. Oelsner ; L. S. Revin ; E. Il'Ichev ; A. L. Pankratov ; H. G. Meyer ; L. Gronberg ; J. Hassel ; Leonid Kuzmin (Institutionen för mikroteknologi och nanovetenskap, Kvantkomponentfysik)
Applied Physics Letters (0003-6951). Vol. 103 (2013), 14,
[Artikel, refereegranskad vetenskaplig]

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.

Denna post skapades 2013-11-12. Senast ändrad 2014-01-30.
CPL Pubid: 186517


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Institutioner (Chalmers)

Institutionen för mikroteknologi och nanovetenskap, Kvantkomponentfysik


Teknisk fysik

Chalmers infrastruktur