2025-11-05
LQ 48
Quantinuum Helios: 48 Logical Qubits at ~2:1 Base-to-Logical Overhead
Quantinuum commercially launched Helios, achieving 48 error-corrected LQ (≤2:1 overhead), 50 LQ error-detected, and 94 LQ globally entangled — all with better-than-base performance. Key fidelities: 2Q gate 99.921%, 1Q gate 99.9975%, logical SPAM 99.99%.
2024-09-10
LQ 12
Microsoft & Quantinuum: 12 Logical Qubits + First Hybrid Chemistry Simulation
Microsoft and Quantinuum tripled their record to 12 LQ on Quantinuum's 56-qubit H2, with a 22× improvement over base error rates. Two LQ drove the world's first end-to-end quantum-AI-HPC chemistry simulation, estimating an iron catalyst's ground-state energy within chemical accuracy.
2024-04-03
LQ 4
Microsoft & Quantinuum: 4 Logical Qubits with 800× Error Improvement
Microsoft’s qubit-virtualization system on Quantinuum’s H2 hardware created 4 highly reliable logical qubits from 30 qubits — delivering an 800× improvement in logical error rate (circuit error rate 10⁻⁵) over physical qubits, with 14,000 error-free independent runs.