Researchers achieved a quantum logic gate with 99.91% fidelity across 17,000 atom pairs by using a geometric protection mechanism based on quantum doublon states in optical lattices — sidestepping the usual precision-speed tradeoff that has limited quantum computing scaling. This work demonstrates that fundamental symmetries like quantum statistics can be engineered into intrinsic fault tolerance rather than bolted on afterward, potentially enabling much larger practical quantum processors. The Nature paper is recent (April 2026) and the specific fidelity figure has been independently corroborated by science journalism outlets covering the ETH Zurich research.