Cryogenic CMOS Logic for Qubit Control Interfaces

The paper studies how cryogenic control circuitry can be redesigned for lower thermal noise and improved qubit interface stability.

• Cryogenic logic cut control noise in the simulated measurement chain
• The design improves the stability of qubit control interfaces at mK temperatures
• Integration costs are offset by better signal integrity and fewer correction cycles

1. 1Modeled cryogenic control paths and their thermal noise characteristics
2. 2Compared CMOS variants under low-temperature operating conditions
3. 3Measured control stability and drift across qubit interface scenarios

• Thermal stability improved when the control plane was simplified
• Noise reduction was most pronounced under longer control windows
• The method is promising for labs building next-generation qubit stacks

Cryogenic CMOS design can significantly improve qubit control fidelity when thermal constraints are handled at the circuit level rather than after deployment.