Kerr-Free Three-Wave Mixing in Superconducting Quantum Circuits

V.V. Sivak, N.E. Frattini, V.R. Joshi, A. Lingenfelter, S. Shankar, and M.H. Devoret
Phys. Rev. Applied 11, 054060 – Published 22 May 2019

Abstract

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 operating 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.

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  • Received 28 February 2019
  • Revised 15 April 2019

DOI:https://doi.org/10.1103/PhysRevApplied.11.054060

© 2019 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied PhysicsNonlinear DynamicsQuantum Information, Science & Technology

Authors & Affiliations

V.V. Sivak*, N.E. Frattini, V.R. Joshi, A. Lingenfelter, S. Shankar, and M.H. Devoret

  • Department of Applied Physics, Yale University, New Haven, Connecticut 06520, USA

  • *sivak.volodymyr@gmail.com

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Vol. 11, Iss. 5 — May 2019

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