This Noisy Quantum Computer Produces Reliable Results Impossible to Simulate Classically

Researchers ran deep quantum circuits on a 127‑qubit superconducting processor and measured accurate expectation values for problems beyond classical brute‑force simulation. Using advanced calibration and noise‑mitigation techniques like zero‑noise extrapolation, they showed the quantum computer can produce results where leading classical methods (tensor networks, MPS, isoTNS) fail. This demonstrates meaningful utility of noisy, pre‑fault‑tolerant quantum devices for complex computations that challenge classical algorithms.