Parallel Assembly of Arbitrary Defect-Free Atom Arrays with a Multitweezer Algorithm br

Defect-free atom arrays are a precursor for quantum information processing and quantum simulationwith neutral atoms. Yet, large-scale defect-free atom arrays can be challenging to realize, due to the lossesencountered when rearranging stochastically loaded atoms to achieve a desired target array. Here, wedemonstrate a parallel rearrangement algorithm that uses multiple mobile tweezers to independently sortand compress atom arrays in a way that naturally avoids atom collisions. With a high degree of parallelism,our algorithm offers a reduced move complexity compared to both single-tweezer algorithms and existingmultitweezer algorithms. We further determine the optimal degree of parallelism to be a balance betweenan algorithmic speedup and multitweezer inhomogeneity effects. The defect-free probability for a 225-atom array is demonstrated to be as high as 33(1)% in a room-temperature setup after multiple cycles ofrearrangement. The algorithm presented here can be implemented for any target array geometry with anunderlying periodic structure.