Harnessing advanced quantum control for better quantum sensing and metrology.

The rapid advancement of quantum technologies has led to diverse applications in sensing, simulation, and computation. Central to these advancements is the development of precise and robust quantum control techniques. In this talk, I will present how innovations in quantum control—ranging from the control of light-matter interaction to the control of (hyperfine) interaction among spins—are enabling breakthroughs in this field. I will introduce a few novel sensing protocols we developed to improve the performance of quantum sensors based on solid-state spins. These protocols include a quantum mixer capable of sensing arbitrary frequency signals, a hyperfine-enhanced gyroscope with up to 1000-fold sensitivity improvement, and techniques to extend spin ensemble coherence to the single-spin limit. In addition, I will report our recent progress in leveraging light-matter interactions within a novel cavity structure to enhance the performance of atom array quantum platforms. Key achievements include probing atom array geometry through cavity Bragg scattering and the first real-time observation of atomic collisions. These advances also pave the way for entanglement-enhanced quantum metrology and next-generation quantum technologies. By integrating these diverse aspects of quantum control, this talk will illustrate how they collectively drive innovation in quantum sensing and metrology, shaping the future of the field.