Dr. Yaowu Liu recently visited our institute together with colleagues for an exciting exchange that included lab tours and in-depth discussions. His talk connected naturally to themes raised during Dr. Phark's earlier visit, while opening up a new frontier: the use of Er atoms as spin qubits. Compared to the previously studied Ti atoms, Er offers dramatically longer coherence lifetimes — a crucial advantage for any quantum computing architecture. Dr. Liu also introduced several schemes for further suppressing decoherence and shed light on the role of anisotropic exchange interactions between Ti and Er atoms, which enable exchange-mediated remote RF modulation. It was an inspiring visit that deepened our understanding of coherence engineering at the atomic scale and left us with plenty of new ideas to explore.