Broadband superconducting amplifier

Quantum technologies operating at microwave technologies, such as Rare Earth ion memories and superconducting circuits, must work at cryogenic temperatures to avoid thermal photons. As a consequence, efficiently extracting a signal from these systems requires quantum limited amplification. Such amplifiers rely on the non-lineariry of the Josephson junctions, lossless superconducting tunneling junctions.

In our group, LI Ye ♋CHUA Wei Hong and LING Chen are looking at novel circuit architectures to provide larger bandwidth and dynamic range for these amplifiers.

Pictures:

Box, open box (can be SPA from Yale)