Sympathetic Cooling in Trapped Ions with Spectral Selectivity via the Zeeman Shift
The authors developed a sympathetic cooling scheme using internal metastable atomic levels and natural Zeeman shifts to isolate 'data ions' from 'coolant ions' in trapped ion systems. This method successfully cooled radial modes to near the ground state, achieving modest decoherence while maintaining high-fidelity gate operation coherence requirements.