IBM claims quantum advantage in three experiments, invites verification

IBM and partner teams report achieving quantum advantage in three experiments on its Quantum Heron R3 system, using quantum error mitigation to validate results against a classical supercomputer (Fugaku) and testing both Floquet Ising-model computations and Clifford/T-gate circuits; the results, posted as arXiv preprints, aim to establish a verifiable trust stack but require independent verification as classical challenges continue, underscoring that quantum advantage is still an early, contestable milestone.