Author(s): Leeseok Kim and Milad Marvian We introduce a high-order dynamical decoupling (DD) scheme for arbitrary bounded system-bath interactions in the weak-coupling regime. Given any decoupling group $\mathcal{G}$ that averages the interaction to zero, our construction guarantees the existence of pulse sequences with at most $(|\mathcal… [Phys. Rev. Lett. 137, 120801] Published Mon Sep 14, 2026