IBM Claims Quantum Advantage With 70 Logical Qubits as Chicago Work Hits 2,415 Operations
Updated
Updated · Quantum Zeitgeist · Aug 3
IBM Claims Quantum Advantage With 70 Logical Qubits as Chicago Work Hits 2,415 Operations
3 articles · Updated · Quantum Zeitgeist · Aug 3
Summary
IBM said on July 30 that work with the University of Chicago met its own quantum-advantage threshold, completing 2,415 logical two-qubit operations on 70 logical qubits in about 15 minutes.
The claim builds on IBM’s doped Clifford sampling approach, which the company says lets the computation self-verify while cutting gate error rates tenfold and reaching 95% confidence in fidelity.
IBM framed the result as evidence the field has entered a “quantum advantage era,” but the report stresses the key test is whether outside researchers can rule out a better classical algorithm.
That scrutiny matters because IBM’s 2023 utility claim was later matched or beaten by classical simulation methods, while its fault-tolerant Starling target of 200 logical qubits remains set for 2029.