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

TL;DR

This paper develops rapid, robust microwave control strategies for nitrogen-vacancy center quantum registers in diamond, significantly reducing control time and enhancing practical implementation for quantum information processing.

Contribution

It introduces optimized all-microwave control methods that cut processing time by 80% and are robust against control imperfections, facilitating practical quantum register manipulation.

Findings

Reduced control processing time by 80%.

Achieved robust control under frequency and amplitude imperfections.

Provided experimentally realizable control fields.

Abstract

Decoherence-protected spins associated with nitrogen-vacancy color centers in diamond possess remarkable long coherence time, which make them one of the most promising and robust quantum registers. The current demand is to explore practical rapid control strategies for preparing and manipulating the such register. 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-endpoints 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 decoherence-protected quantum register for future quantum technology applications.