Compact Itinerant Microwave Photonics with Superconducting High-Kinetic Inductance Microstrips

TL;DR

This paper presents a compact superconducting microwave photonics platform using high-kinetic inductance microstrips, enabling broadband routing and network functionalities for quantum technologies.

Contribution

It introduces a novel microstrip design with high kinetic inductance that reduces phase velocity, addressing integration challenges in superconducting microwave photonics.

Findings

Demonstrated broadband routing capabilities

Enabled emulation of complex networks

Achieved generalized linear and nonlinear network functionalities

Abstract

Microwave photonics is a remarkably powerful system for quantum simulation and technologies, but its integration in superconducting circuits, superior in many aspects, is constrained by the long wavelengths and impedance mismatches in this platform. We introduce a solution to these difficulties via compact networks of high-kinetic inductance microstrip waveguides and coupling wires with strongly reduced phase velocities. We demonstrate broadband capabilities for superconducting microwave photonics in terms of routing, emulation and generalized linear and nonlinear networks.