Cryogenic measurement technology for ultra-low noise electronics

Fraunhofer IAF develops ultra-low noise and compact high frequency electronics, for applications such as space communication, climate and Earth observation from space and quantum computing. Electronics in quantum computers, which are used in close proximity to the qubits, must not only be compatible with operation at extremely low temperatures, but also exhibit extremely low noise as well as negligible heating. 

In order to determine and further improve the performance of cryogenic electronic components, the institute has state-of-the-art cryogenic measurement technology at its disposal. The cryogenic test stations of Fraunhofer IAF allow DC measurements as well as scattering parameter and noise temperature measurements of cryogenically cooled single devices and integrated circuits inside a cryochamber down to temperatures of 10 K (approx. -263° C). The institute contributes its expertise in cryogenic measurement techniques, the design of cryogenic circuits as well as amplifiers to the EU projects “Sequence” and “MATq” as well as to the BMBF-funded projects “MUNIQC-SC” and “qBriqs,” among others.

Novel cryogenic on-wafer prober

Fraunhofer IAF already holds a good position in Europe in the field of characterizing measurement techniques of solid-state based qubits at cryogenic temperatures and is further expanding its competence: With support from the BMBF, the institute is creating a novel on-wafer prober that can simultaneously characterize more than 200 devices at qubit operating temperatures of below 2 K.

Starting in 2022, researchers at Fraunhofer IAF want to use the prober to present statistical data on the variance of qubits generated with different semiconductor technologies for the first time in Europe. The data to be obtained are essential for the establishment of a European value chain of industrially ready solid-state quantum computers.