IBM’s Quantum Chemistry Breakthrough Just Failed a Spin Audit—And the AI That Caught It Retracted Its Own Best Finding
A spin audit of IBM’s flagship quantum chemistry paper reveals their quantum computer converges to the wrong electronic state—a triplet instead of a singlet—with errors up to 1,438 millihartree. The AI that caught the error retracted its own pro-quantum finding when it realized it was a spin artifact. The burden of proof just shifted.