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Paper detail

A three-dimensional Josephson parametric amplifier

A Josephson parametric amplifier (JPA) is executed in a three-dimensional (3D) microwave cavity by coupling it to a superconducting quantum interference device (SQUID) that is embedded in a two-dimensional resonator. The JPA is activated in a three-wave mixing configuration by injecting ac magnetic flux, at twice the 3D cavity frequency, into the SQUID. An 8.3 GHz cavity is measured in a non-degenerate phase-insensitive configuration which yields gains in excess of 40 dB, where a 20 dB gain results in an operational bandwidth of 0.4 MHz, a 1 dB compression point of -115 dBm with half a quantum of added noise.

preprint2022arXivOpen access
I. MahboobH. ToidaK. KakuyanagiY. NakamuraS. Saito
quant-ph
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I. MahboobH. ToidaK. KakuyanagiY. NakamuraS. Saito

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