We use these unique devices for measuring the noise in quantum 
circuits. Already six years of repeated cooldowns from ambiant to mK 
temperatures and these HEMTs are just as good as day 1!

Frédéric Pierre (CNRS research director at C2N, Palaiseau, France)

These HEMT amplifiers are fantastic. They enabled us to develop a new 
detection method of the vibrations of nanotube mechanical resonators 
with unprecedented level. It works extremely well, so that we 
implemented these HEMT amplifiers in all our cryostats.

Adrian Bachtold (Professor of ICFO, Barcelona, Spain)

The amplifier from CRYOHEMT allowed us to maximize the performance of the low temperature MHz circuitry we use to measure current noise at the atomic scale. Its characteristics are remarkably constant over time, even after numerous temperature cycles from 1K to room temperature. I highly recommend them to anyone interested in low temperature amplification.

Freek Massee (CNRS researcher at the Laboratoire de Physique des Solides, Orsay, France)

We have been using CRYOHEMT amplifiers since 2013. None of our past experiments since that time would have been possible without them and they are now systematically installed on any new experience we design. Remarkably, we did not need to replace any amplifier since 2013 and they have an excellent stability in time.

Gwendal Fève (Professor of Physics, ENS, Paris, France)