High Efficiency Floquet-mode Travelling Wave Parametric Amplifier Characterization and Measurement
ORAL
Abstract
Uniform Josephson travelling wave parametric amplifiers (JTWPAs) feature high and broadband gain, but typically feature noise performance 20% below the ideal quantum limit. To suppress sideband noise, Floquet-mode JTWPAs have been proposed and fabricated using the same high-Q fabrication process as superconducting qubits. Here we present efficiency characterizations utilizing both circuit-QED and waveguide-QED calibration methods over a bandwidth of 0.5 GHz. We demonstrate improvement in the intrinsic and full-system efficiencies for a Floquet JTWPA, compared to a uniform JTWPA in the same setup. We then explore the potential of operating the Floquet JTWPA in series with a uniform high-dynamic range JTWPA to further boost full-system efficiency.
*This work is supported by the Intelligence Advanced Research Projects Activity (IARPA), AWS Center for Quantum Computing, and under Air Force Contract No. FA8702-15-D-0001. Any opinions, findings, conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the Intelligence Advanced Research Projects Activity or the U.S. Air Force. J. Wang, D. Zaidenberg, and A. Yen acknowledge support from the NSF GRFP.
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Presenters
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Jennifer Wang
- Massachusetts Institute of Technology