Scientists used a new error correction method to encode 70 logical qubits and crack a classically intractable problem. The quantum computation finished in approximately 15 minutes — a task that would demand infeasible amounts of time with leading classical computing methods.
Jul 30, 2026
YORKTOWN HEIGHTS, N.Y. and CHICAGO – July 30, 2026 – IBM (NYSE: IBM) and researchers from the University of Chicago today announced a demonstration in quantum computing that achieves the fundamental criteria for quantum advantage: performing computations beyond the reach of leading classical simulation methods while providing trust that the computation returned accurate results.
In their new paper, “Sampling hard circuits with verifiably high fidelity,” the researchers showed that these two goals could be simultaneously achieved by a novel construction of encoded quantum circuits, enabling one of the largest demonstrations of logical quantum computing to date. These circuits and their results are also now openly released on the Quantum Advantage Tracker.
Building Trust into Quantum Results
