AbaQus: A Dynamically Reconfigurable Triple-Magic Atom Array For The Sr Fine-Structure Qubit

We report on the development of a novel tweezer architecture for the recently demonstrated fine-structure qubit for Sr. By using a carefully designed optical setup [1,2] that scale and guide up to 1280 beams generated by twenty acousto-optic deflectors (AOD), we generate a 64x20 tweezer array consisting of near diffraction limited spots. After chirp cooling and parity projection to prepare single atoms, we will utilize an FPGA integrated with an ultra-low noise camera and an RF system to analyze and sort the atomic array to a target geometry. By implementing on-the-fly atom detection and frequency chirp calculations, we can achieve very small latencies between atom detection and array reconfiguration. Furthermore, the use of AODs allows for parallel reconfiguration of each column of the atom array well within the measured coherence time of the qubit, opening up the path to mid-circuit reconfiguration and error-correction. Furthermore, our setup is built to achieve triple-magic conditions for our qubit states ³P₂ and ³P₀ as well as the Rydberg state. We will achieve this by a proper choice of our tweezer wavelength and tuning the tensor polarizability of the ³P₂ state via the tweezer polarization, allowing us to eliminate motional dephasing during Rydberg excitation. Our tweezer architecture provides a novel, fast and inherently reconfigurable platform that unfolds further possibilities for neutral atom quantum computing and error-correction.

[1] M. Adams et al., Optical setup for a two-dimensional tweezer array with independently adjustable columns for neutral atom quantum computing, Proceedings Volume 12911, Quantum Computing, Communication, and Simulation IV; 129110L (2024)

[2] F. Meinert et al., Device and Method for Generating Optical Tweezers, US Patent 18530288.