Cryogenic InGaAs HEMT-Based Switches For Quantum Signal Routing

We demonstrate cryogenic switching devices based on HEMT technology for quantum computer (QC) signals that exhibit attractive performance with cryogenic subthreshold swing of ~5 mV/decade. The results indicate that HEMT-based switching circuits could offer advantages over standard CMOS at cryogenic temperatures for future integrated low-power QC signal routing applications.