Low-noise cryogenic microwave amplifier characterization with a calibrated noise source
Low-noise cryogenic microwave amplifier characterization with a calibrated noise source
Parametric amplifiers have become a workhorse in superconducting quantum computing; however, research and development of these devices has been hampered by inconsistent and, sometimes, misleading noise performance characterization methodologies. The concepts behind noise characterization are deceptively simple, and there are many places where one can make mistakes, either in measurement …