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Silicon Quantum Computing Achieves Breakthrough with 99.99% Fidelity

12/21/2025

Summary

Story summary

Silicon Quantum Computing (SQC) reports a highly accurate chip using the '14/15' architecture that integrates phosphorus atoms in silicon.
The study, published on December 17, 2025, shows fidelity rates from 99.5% to 99.99% across nine nuclear and two atomic qubits.
SQC demonstrated 98.9% fidelity on Grover's algorithm without error correction, surpassing IBM and Google.
SQC says the scalable architecture could enable fault-tolerant processors with millions of qubits.

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Story summary

Silicon Quantum Computing (SQC) reports a highly accurate chip using the '14/15' architecture that integrates phosphorus atoms in silicon.
The study, published on December 17, 2025, shows fidelity rates from 99.5% to 99.99% across nine nuclear and two atomic qubits.
SQC demonstrated 98.9% fidelity on Grover's algorithm without error correction, surpassing IBM and Google.
SQC says the scalable architecture could enable fault-tolerant processors with millions of qubits.