Single-Photon Detection with a Josephson Junction Coupled to a Resonator,Physical Review Applied

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Single-Photon Detection with a Josephson Junction Coupled to a Resonator
Physical Review Applied ( IF 3.8 ) Pub Date : 2021-07-09 , DOI: 10.1103/physrevapplied.16.014025
Dmitry S. Golubev ₁ , Evgeni V. Il’ichev _{2,

3} , Leonid S. Kuzmin _{4,

5}

Affiliation

We use a semiclassical formalism to optimize a microwave single-photon detector based on switching events of a current-biased Josephson junction coupled to a resonator. To detect very rare events, the average time between dark counts

τ_{dark}

should be maximized taking into account that the switching time

τ_{sw}

should be sufficiently small. We demonstrate that these times can be tuned in a wide range by changing the junction parameters, and

τ_{dark} / τ_{sw} \sim 10^{9}

can be achieved. Therefore, a junction-resonator arrangement can be used to detect extremely low photon fluxes (e.g., for searching for galactic axions).

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