➀ TOPTICA developed the "Topticlock," an atomic clock using a single Yb+ ion to achieve ~10⁻¹⁷ accuracy, marking a commercial benchmark with PTB;

➁ The compact system (two 19-inch racks) is undergoing validation at PTB and will be delivered to a Vienna client;

➂ Combines laser cooling, quantum-state control, and ultra-stable lasers, featuring 871nm optical output convertible to microwaves via frequency combs.