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This demonstration marks a pivotal milestone in logical quantum computing by simultaneously achieving computational advantage over classical systems while providing verifiable proof of accuracy without relying on unproven assumptions. By utilizing encoded circuits that reduce effective error rates below those of physical qubits, the researchers have established a new benchmark for trust and reliability in large-scale quantum operations. The open release of these hard circuits via the Quantum Advantage Tracker further accelerates community analysis of this breakthrough in fault-tolerant architectures.
IBM and University of Chicago Demonstrate Verified Logical Quantum Computation Beyond Classical Simulation

Insider Brief Press release – 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 […]
IBM and the University of Chicago demonstrated a logical quantum computing experiment that achieved computations beyond leading classical simulation methods while providing verification of the results. The researchers used encoded quantum circuits with 70 logical qubits, completing thousands of logical operations with lower effective error rates than the underlying physical qubits. The team released the circuits and results through the Quantum Advantage…
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