Microwave photon detection by an Al Josephson junction

Revin, L. S. (author): Russian Academy of Sciences,Nizhny Novgorod State Technical University

Pankratov, A. L. (author): Lobachevsky State University of Nizhni Novgorod,Russian Academy of Sciences,Nizhny Novgorod State Technical University

Yablokov, Anton A. (author): Russian Academy of Sciences,Nizhny Novgorod State Technical University

Rakut, I. V. (author): Nizhny Novgorod State Technical University,Lobachevsky State University of Nizhni Novgorod

Kuzmin, Leonid, 1946 (author): Chalmers tekniska högskola,Chalmers University of Technology,Nizhny Novgorod State Technical University

(creator_code:org_t)

2020-06-23
2020
English.
In: Beilstein Journal of Nanotechnology. - : Beilstein Institut. - 2190-4286. ; 11, s. 960-965

Related links:: https://research.cha... (primary) (free); show more...; https://www.beilstei...; https://research.cha...; https://doi.org/10.3...; show less...

Abstract Subject headings

An aluminium Josephson junction (JJ), with a critical current suppressed by a factor of three compared with the maximal value calculated from the gap, is experimentally investigated for application as a threshold detector for microwave photons. We present the preliminary results of measurements of the lifetime of the superconducting state and the probability of switching by a 9 GHz external signal. We found an anomalously large lifetime, not described by the Kramers' theory for the escape time over a barrier under the influence of fluctuations. We explain it by the phase diffusion regime, which is evident from the temperature dependence of the switching current histograms. Therefore, phase diffusion allows for a significant improvement of the noise immunity of a device, radically decreasing the dark count rate, but it will also decrease the single-photon sensitivity of the considered threshold detector. Quantization of the switching probability tilt as a function of the signal attenuation for various bias currents through the JJ is observed, which resembles the differentiation between N and N + 1 photon absorption.

NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
NATURVETENSKAP -- Fysik -- Annan fysik (hsv//swe)
NATURAL SCIENCES -- Physical Sciences -- Other Physics Topics (hsv//eng)
NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)

By the author/editor: Revin, L. S.; Pankratov, A. L.; Gordeeva, A. V.; Yablokov, Anton ...; Rakut, I. V.; Zbrozhek, V. O.; show more...; Kuzmin, Leonid, ...; show less...

About the subject

NATURAL SCIENCES: NATURAL SCIENCES; and Physical Science ...; and Atom and Molecul ...

NATURAL SCIENCES: NATURAL SCIENCES; and Physical Science ...; and Other Physics To ...

NATURAL SCIENCES: NATURAL SCIENCES; and Physical Science ...; and Condensed Matter ...

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