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IBM, University of Chicago complete verifiable quantum computation with 70 logical qubits

IBM and researchers at the University of Chicago said they completed a verifiable quantum computation using 70 logical qubits, a task difficult for classical computers. The team applied a new error-correction approach and finished the calculation in about 15 minutes. The work also offers a way to verify results, a long-standing hurdle in demonstrating quantum advantage. Researchers said the logical error rate fell to about one-tenth of the physical error rate.