Pasqal's 256-qubit neutral-atom processor observed an unexpected slowdown in a 2D quantum magnet's dynamics, diverging from classical simulations. This research, detailed in a preprint, explores the relaxation landscape of a 2D transverse-field Ising model, uncovering three distinct physical behaviors including a previously unpredicted relaxation slowdown at intermediate field strengths. The study highlights the quantum processor's ability to explore non-equilibrium condensed-matter regimes beyond the limits of classical tensor-network simulations.
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