IBM and University of Chicago demonstrate quantum advantage with trusted error-corrected computing breakthrough

IBM and researchers at the University of Chicago announced they demonstrated quantum advantage by showing a quantum computer outperforming leading classical methods on a trusted computation with a new verification approach. The research presented a novel method of constructing encoded quantum circuits that combined large-scale logical quantum computing with built-in error detection. The team said the technique retained the computational difficulty of random circuit sampling while allowing errors to be identified during processing. Researchers executed 70 logical qubits protected by error correction, completing 2,415 logical two-qubit operations and 468 logical T gates, making it one of the largest logical quantum computing demonstrations to date. The quantum computer completed the task in about 15 minutes. According to the researchers, comparable classical simulation approaches would require impractical runtimes, reinforcing the system's performance advantage. Bill Fefferman, Associate Professor of Computer Science at the University of Chicago, said verification remains one of the biggest challenges in firmly establishing experimental quantum advantage. IBM Research director and IBM Fellow Jay Gambetta said the industry is now firmly in the quantum advantage era.