IBM Demonstrates Quantum Advantage with 70 Logical Qubits in 15 Minutes

IBM and the University of Chicago used a 70-qubit logical-qubit, error-corrected quantum circuit to perform a classically intractable calculation in about 15 minutes, far faster than practical classical methods. They also introduced a structured verification approach that preserves the problem’s hardness while enabling error detection, addressing a major challenge in proving quantum advantage. The work, involving 2,415 logical two-qubit operations and 468 logical T gates, showcases large-scale encoded quantum computing and moves toward more trustworthy, scalable quantum machines.