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arxiv: 2304.04378 · v2 · pith:4LI7AXAS · submitted 2023-04-10 · cond-mat.supr-con · hep-ph

Josephson Parametric Amplifier in Axion Experiments

Jinmyeong Kim , Boris I. Ivanov , \c{C}a\u{g}lar Kutlu , Seongtae Park , Arjan F. Van Loo , Yasunobu Nakamura , Sergey V. Uchaikin , Seonjeong Oh
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Violeta Gkika Andrei Matlashov Woohyun Chung Yannis K. Semertzidis
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classification cond-mat.supr-con hep-ph
keywords amplifieraxionnoiseexperimentsjosephsonparametricaddedallowed
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The axion is a hypothetical particle, a promising candidate for dark matter, and a solution to the strong CP problem. Axion haloscope search experiments deal with a signal power comparable to noise uncertainty at millikelvin temperature. We use a flux-driven Josephson parametric amplifier (JPA) with the aim of approaching a noise level near the theoretically allowed limit of half quanta. In our measurements to characterize the JPA we have found the added noise to the system with a JPA as the first-stage amplifier to be lower than 110 mK at the frequencies from 0.938 GHz to 0.963 GHz.

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