Atom-by-atom assembly with optical tweezers enables the generation of defect-free atomic arrays with flexible geometries. 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. Applying this high-fidelity approach to chaotic many-body dynamics, we recently uncovered the emergence of randomly distributed pure state ensembles. We are exploiting this phenomenon for global fidelity estimation during many-body dynamics, targeting maximum entanglement entropy states in systems with up to 60 atoms. In this regime, our results are challenging state-of-the art classical algorithms, for which we provide a resource analysis in terms of what is required to achieve fidelities higher than our experiment.
Host: Nir Navon (nir.navon@yale.edu)