Willow
Released 2024-12-09 · verified 2026-09-29
Physical qubits: 105
Logical qubits: not reported
System source ↗VERIFIED QUANTUM PROGRESS
Measure the
milestones.
Physical qubits, logical qubits, fidelity and error rates describe different things. Systems are grouped by architecture and are not ranked by qubit count.
superconducting
Heron r3
Released 2026-05-04 · verified 2026-09-29
Physical qubits: 156
Logical qubits: not reported
Median two-qubit error rate: 0.00117 probability · IBM reported fleet metric · source ↗
System source ↗trapped ion
System Model H2-1
Released 2024-06-05 · verified 2026-09-29
Physical qubits: 56
Logical qubits: not reported
System source ↗