BERKELEY AMO/QI SEMINAR: Yiyi Li, Princeton

Abstract: Neutral-atom quantum processors are a promising platform for scalable quantum computing, combining high-fidelity operations with flexible, reconfigurable qubit arrays. In this talk, I will present our recent progress toward scalable quantum processors with ¹⁷¹Yb atoms, spanning fast atom preparation, high-fidelity gates, quantum circuits, and architectures beyond a single atomic array.

I will first discuss fast, continuous atom reloading, which addresses atom loss as an important obstacle to deep quantum circuits. Using a continuously loaded reservoir near the computation zone, we demonstrate on-demand atom extraction at rates of up to 500 atoms per second and initialization of new, stochastically filled qubit arrays at 30 Hz. This process includes single-atom preparation, non-destructive imaging, and qubit initialization while preserving existing metastable nuclear-spin qubits. I will also describe recent advances in high-speed single-atom preparation using Rydberg blockade and our progress toward implementing increasingly complex quantum circuits. Finally, I will discuss an architecture for fast interconnects between atomic arrays, opening a path toward larger-scale, modular quantum processors.