Noise Processes Limiting Silicon Spin Qubit Performance up to 1 Kelvin

Silicon spin qubits are promising candidates for scalable quantum processors, with proposals often leveraging operation at elevated temperatures up to 1 K. However, higher temperatures reduce readout fidelity, shorten spin lifetimes, and degrade coherence. Building large-scale systems that integrate dense readout Single-Electron Transistors, monolithically integrated CryoCMOS control, and exploit the higher cooling power available at 1 K requires strategies to mitigate these effects. We present a detailed study of the noise processes responsible for the temperature-dependent degradation of silicon spin qubit performance as a function of temperature and frequency. Understanding and suppressing these noise sources will be crucial for realizing high-fidelity, scalable quantum computing in the 1 K regime.