Optimal operating temperature for industry-compatible silicon spin quantum computing: colder is not necessarily better

Silicon spin qubits, a top contender for large-scale quantum computing, face a critical challenge in managing thermal loads as they scale up to useful fault-tolerant processors. Operating at millikelvin temperatures, the traditional approach, may not be feasible due to cooling power limitations. Researchers have found that increasing the operating temperature can alleviate cooling requirements, but at the cost of reduced gate fidelity, leading to increased error rates¹. This trade-off necessitates a reevaluation of the optimal operating temperature for silicon spin qubits. The quest for a balance between cooling demands and gate fidelity is crucial, as it directly impacts the viability of large-scale quantum computing. So what matters to practitioners is that understanding this delicate balance is essential to overcome the thermal management hurdles and unlock the full potential of silicon spin qubits in quantum computing applications.