Quantum Hardware Database
IBM Eagle
IBM Eagle was the first quantum processor to exceed 100 qubits, released as part of IBM's published hardware roadmap. It marked a significant scaling milestone and validated the heavy-hex lattice architecture that IBM continued to use in later, larger processors like Condor.
Qubit Count
127
Qubit Type
Superconducting (fixed-frequency transmon qubits)
Architecture
Heavy-hex lattice
Released
2021
Gate Error (2Q)
~0.5–1% per two-qubit gate (at time of release)
Coherence Time
T₁ ~100 µs (at time of release)
Operating Temp
~15 millikelvin
Cloud Access
Yes — IBM Quantum (cloud.ibm.com)
Company
IBM
Connectivity
Heavy-hex — each qubit connects to 2 or 3 neighbors
Key Features
- First processor to exceed 100 qubits
- Validated heavy-hex lattice scaling for future larger processors
- Part of IBM's first publicly committed multi-year hardware roadmap
Limitations
- Higher error rates than later IBM processors like Heron
- Superseded relatively quickly by Osprey and Condor in qubit count
Technical Notes
Eagle's main historical significance is as a scaling proof point — demonstrating that IBM's heavy-hex architecture and fabrication process could be extended past the 100-qubit mark while remaining operable, paving the way for the much larger Osprey and Condor processors that followed.