A two-dimensional optical tweezer array of Cs with Raman sideband cooling

Individually trapped neutral atoms in geometrically configurable optical tweezers, controllably interacting via their Rydberg states, comprise a promising platform for quantum simulation and computation. To date, they have been used to study quantum spin models, perform quantum logic operations and build a quantum processor. In our experiment, we create a two-dimensional 6x12 Cs atomic array using a spatial light modulator (SLM). These static tweezers are loaded from a magneto-optical trap (MOT), with a loading probability of ~ 60%. This stochastically loaded atomic array is later rearranged into a defect free 6x6 atomic array via a mobile optical tweezer array created by acoustic optical deflectors, with an averaged rearrangement fidelity across the target array of around 95%. Raman sideband cooling is applied, achieving motional ground state cooling across the entire array. Motional ground state cooling suppresses Doppler dephasing on the Rydberg transition and paves the way to experiments requiring good coherence between Rydberg and ground state of atoms.