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Book a scoping call →Quantinuum H2-1 is Quantinuum's 56-qubit trapped-ion quantum processor, successor to the 32-qubit H1 series. H2-1 uses barium-137 ions in a cryogenic linear trap architecture with ion-shuttling for all-to-all connectivity. The system consistently posts the highest two-qubit gate fidelity (~99.9%) of any commercially accessible quantum processor.
1Q Gate Fidelity
Average single-qubit gate fidelity reported by Quantinuum for H2 system.
2Q Gate Fidelity
Average two-qubit ZZ gate fidelity. Among the highest published for any commercial quantum system.
Readout Fidelity
State discrimination fidelity using high-efficiency photomultiplier detection.
Coherence T1
Barium-137 hyperfine qubit T1 is on the order of minutes under typical operating conditions.
Coherence T2
T2 coherence times measured in tens of seconds; among the longest of any commercial platform.
Connectivity
Performance metrics vary by operating conditions and measurement methodology. Values represent manufacturer-reported or independently measured figures.
Conceptual Trapped Ion architecture representation
Quantum Chemistry
strong
Materials Science & Discovery
strong
Combinatorial Optimization
possible
Financial Modeling
possible
Quantum Machine Learning
possible
Cryptanalysis & Post-Quantum Cryptography
experimental
Based on Trapped Ion architecture characteristics and published use-case research.
| Architecture | Trapped Ion |
| Paradigm | Gate-based |
| Physical Qubits | 56qubits |
| Connectivity | all-to-all Full all-to-all qubit connectivity via ion shuttling in a penning trap architecture. Qubits are moved to interaction zones for two-qubit gates. |
| All-to-All | Yes |
| Average Degree | — |
| Native Gates | RZ, RY, RX, ZZ, CNOT |
| Cloud Platforms | azure-quantum, quantinuum-nexus |
| Regions | eastus, eu-west |
| Access Models | reservation, enterprise |
| Announced | Jun 2023 |
| Released | Sep 2023 |
Quantinuum H-Series System Model H2 Specifications
All factual specifications cite primary manufacturer or cloud provider documentation.