Quantum Science with Tweezer Arrays

Atom-by-atom assembly with optical tweezers enables the generation of defect-free atomic arrays with flexible geometric arrangements. Combined with controlled excitation to Rydberg states, this has become a highly versatile platform for quantum computing, simulation, and metrology. I will review these developments with a focus on two valence electron atoms: The rich level structure of such atoms enables novel cooling, control, and read-out schemes, which we have used in demonstrations of record imaging and two qubit entanglement fidelities for neutral atoms. At the same time, this direction merges high-precision spectroscopy with single-atom control resulting in a novel type of optical clock platform. Further, by applying this high-fidelity approach to many-body systems, we recently uncovered the emergence of random pure state ensembles in chaotic dynamics. Such random ensembles play an important role in quantum information science associated with device verification, supremacy tests, and quantification of complexity growth, and we show benchmarking of a Rydberg atom quantum simulator as a concrete application.