# Amplitude-Damping Noise Now Joins the Classically Simulable Column for IQP Circuits - Date: 2026-04-08 - Category: Quantum Computing IQP circuits with amplitude-damping noise can now be classically simulated in polynomial time. That sounds like a quantum killer. It is not — but it narrows the gap between what classical algorithms can spoof and what quantum hardware needs to do to stay ahead. ---