Quantum-limited Josephson parametric amplifiers are crucial components in circuit QED readout chains. The dynamic range of state-of-the-art parametric amplifiers is limited by signal-induced Stark shifts that detune the amplifier from its operating point. Using a Superconducting Nonlinear Asymmetric Inductive eLement (SNAIL) as an active component, we show the ability to in situ tune the device flux and pump to a dressed Kerr-free operating point, which provides a 10-fold increase in the number of photons that can be processed by our amplifier, compared to the nominal working point. Our proposed and experimentally verified methodology of Kerr-free three-wave mixing can be extended to improve the dynamic range of other pumped operations in quantum superconducting circuits.
@article{arxiv.1902.10575,
title = {Kerr-free three-wave mixing in superconducting quantum circuits},
author = {V. V. Sivak and N. E. Frattini and V. R. Joshi and A. Lingenfelter and S. Shankar and M. H. Devoret},
journal= {arXiv preprint arXiv:1902.10575},
year = {2019}
}