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Book a scoping call →IBM Heron r2 is IBM's 156-qubit processor featuring tunable couplers between qubit pairs, a significant architectural change from the fixed-coupler Eagle generation. Tunable couplers suppress ZZ parasitic coupling during idle periods, reducing crosstalk-related errors that limited Eagle circuits. Heron processors use the CZ gate as their native two-qubit gate.
1Q Gate Fidelity
Target single-qubit gate error < 0.05%.
2Q Gate Fidelity
Target CZ gate error < 0.3%; tunable couplers suppress ZZ crosstalk vs. Eagle ECR gates.
Readout Fidelity
Target readout assignment error < 1.5%.
Coherence T1
Heron r2 T1 expected to be comparable to or improved over Eagle r3 (100–300 µs median).
Coherence T2
T2 coherence improved by tunable coupler architecture reducing idle ZZ coupling.
Connectivity
Avg. degree: 2.9
Performance metrics vary by operating conditions and measurement methodology. Values represent manufacturer-reported or independently measured figures.
Conceptual Superconducting architecture representation · heavy-hex
Quantum Chemistry
strong
Materials Science & Discovery
strong
Combinatorial Optimization
possible
Financial Modeling
possible
Quantum Machine Learning
possible
Cryptanalysis & Post-Quantum Cryptography
experimental
Based on Superconducting architecture characteristics and published use-case research.
| Architecture | Superconducting |
| Paradigm | Gate-based |
| Physical Qubits | 156qubits |
| Connectivity | heavy-hex Heavy-hex variant with tunable couplers between qubit pairs, reducing ZZ parasitic coupling during idle periods. |
| All-to-All | No |
| Average Degree | 2.9 |
| Native Gates | CZ, ID, RZ, SX, X |
| Cloud Platforms | ibm-quantum |
| Regions | us-east, us-south, eu-de, jp-tok |
| Access Models | subscription, enterprise, reservation |
| Announced | Dec 2023 |
| Released | Mar 2024 |
IBM Quantum System Documentation
IBM Quantum Documentation — System Configuration
All factual specifications cite primary manufacturer or cloud provider documentation.