Infleqtion Unveils UK’s First Operational 100-Qubit Quantum System with 99.73% Fidelity
Infleqtion deployed the UK’s only operational 100-physical-qubit Sqale quantum computer at the National Quantum Computing Centre in December 2025. Its neutral-atom platform achieves 99.73% two-qubit gate fidelity, advancing complex algorithm testing, error-correction research and scalable, fault-tolerant architecture development.
1. UK’s First Operational 100-Qubit System
Infleqtion installed its Sqale neutral-atom quantum computer at the National Quantum Computing Centre in December 2025, marking the UK’s only operational 100-physical-qubit system and a critical infrastructure milestone for large-scale quantum experiments.
2. Industry-Leading Gate Fidelity
The platform achieves 99.73% two-qubit gate fidelity, reducing physical-qubit requirements per logical qubit and enhancing scalability, positioning Infleqtion’s neutral-atom architecture ahead of other physical implementations.
3. Enabling Advanced Quantum Research
Researchers can now test complex algorithms, evaluate error-correction schemes, and explore applications in materials science, energy systems and optimization, accelerating practical quantum computing development.
4. Roadmap Toward Fault-Tolerant Architectures
Infleqtion aims to surpass 30 logical qubits in 2026 and exceed 100 logical qubits by 2028, leveraging high-fidelity performance to progress toward fully fault-tolerant quantum computers.