| Metric | JUQ‑259 | Best prior (2024) | |--------|--------|-------------------| | Physical qubits | 256 | 192 | | Median gate fidelity (single‑qubit) | 99.999 % | 99.95 % | | Median gate fidelity (two‑qubit) | 99.97 % | 99.80 % | | Readout error | 0.3 % | 0.7 % | | Surface‑code logical error rate (d=9) | 1.2 × 10⁻⁴ per cycle | 4.8 × 10⁻³ per cycle | | Quantum Volume | 2 × 10⁶ | 1 × 10⁶ | | Energy per gate (at 10 mK) | 2 × 10⁻⁸ J | 6 × 10⁻⁸ J |
By [Your Name] – Tech Explorer Blog Published April 16 2026 JUQ-259