Authors
Ryan Kaufman, Theodore White, Mark I Dykman, Andrea Iorio, George Sterling, Sabrina Hong, Alex Opremcak, Andreas Bengtsson, Lara Faoro, Joseph C Bardin, Tim Burger, Robert Gasca, Ofer Naaman
Publication date
2023/11/28
Journal
Physical Review Applied
Volume
20
Issue
5
Pages
054058
Publisher
American Physical Society
Description
We demonstrate a Josephson parametric amplifier design with a band-pass impedance-matching network based on a third-order Chebyshev prototype. We measured eight amplifiers operating at 4.6 GHz that exhibit gains of 20 dB with less than 1-dB gain ripple and bandwidth up to 500 MHz. The amplifiers further achieve high-output-saturation powers around− 73 dBm based on the use of rf superconducting quantum interference device arrays as their nonlinear element. We characterize the system readout efficiency and its signal-to-noise ratio near saturation using a Sycamore processor, finding the data consistent with near quantum limited noise performance of the amplifiers. In addition, we measure the amplifiers’ intermodulation distortion in two-tone experiments as a function of input power and intertone detuning, and observe excess distortion at small detuning with a pronounced dip as a function of signal …
Total citations
2023202445
Scholar articles
R Kaufman, T White, MI Dykman, A Iorio, G Sterling… - Physical Review Applied, 2023