Rapid transform optimization strategy for decoherence-protected quantum register in diamond

Decoherence-protected spins associated with nitrogen-vacancy color centers in diamond possess remarkably long coherence time, which makes them one of the most promising and robust quantum registers. The current demand is to explore practical rapid control strategies for preparing and manipulating such registers. Our work provides all-microwave control strategies optimized using multiple optimization methods to significantly reduce the processing time by $80\%$ with a set of smooth near-zero-end-point control fields that are shown to be experimentally realizable. Furthermore, we optimize and analyze the robustness of these strategies under frequency and amplitude imperfections of the control fields, during which process we use only 16 samples to give a fair estimation of the robustness map with 2500 pixels. Overall, we provide a ready-to-implement recipe to facilitate high-performance information processing via a decoherence-protected quantum register for future quantum technology applications.