Design and characterization of a lumped element single-ended superconducting microwave parametric amplifier with on-chip flux bias line

TL;DR

This paper presents a superconducting microwave parametric amplifier with a single-ended design, on-chip flux bias line, and broadband, quantum-limited amplification between 5-7 GHz, featuring fast tunability and high saturation power.

Contribution

The work introduces a novel lumped-element Josephson parametric amplifier with integrated flux bias line enabling rapid frequency tuning and broadband quantum-limited amplification.

Findings

Achieves broadband amplification between 5-7 GHz with quantum-limited noise.

Provides fast frequency tuning over hundreds of MHz in less than 10 ns.

Demonstrates input saturation power exceeding -120 dBm.

Abstract

We demonstrate a lumped-element Josephson parametric amplifier, using a single-ended design that includes an on-chip, high-bandwidth flux bias line. The amplifier can be pumped into its region of parametric gain through either the input port or through the flux bias line. Broadband amplification is achieved at a tunable frequency $\omega/2 \pi$ between 5 to 7 GHz with quantum-limited noise performance, a gain-bandwidth product greater than 500 MHz, and an input saturation power in excess of -120 dBm. The bias line allows fast frequency tuning of the amplifier, with variations of hundreds of MHz over time scales shorter than 10 ns.