Cryogenic Microwave Measurement and Characterization Approaches for Communications and Quantum Information

Robust modeling and accurate characterization of microwave superconducting devices and circuits in the cryogenic environment will be key for upscaling future solid-state quantum information systems. In this talk, I will present new developments in cryogenic measurement, calibration, and characterization of microwave superconductive devices at 4 Kelvin and the application of these techniques to the design of a novel superconductor RF voltage standard instrument at NIST. This discussion will include advanced microwave characterization approaches like load-pull and X-parameters at cryogenic temperatures. The proposed techniques can also be applied to superconducting quantum computers and can help to optimize the quantum-classical interfaces in these systems. I will also touch on our efforts on modeling and simulation of Josephson-based devices (eg JJ arrays, SQUIDs) for the design and optimization of quantum microwave circuits.