A dual-element, two-dimensional atom array with continuous-mode operation for ancilla-assisted quantum protocols

Independent control of multiple qubit modalities significantly increases the capabilities of any quantum information processing platform. Optical tweezer arrays of individually trapped neutral atoms have recently implemented large, coherent quantum systems. However, due to the inherently identical nature of the atoms and fluorescence-based destructive imaging techniques, the platform suffers from the lack of scalable crosstalk-free control. Such control is essential for feedback-based quantum protocols like non-demolition readouts and error correction. To address this challenge, we present the experimental implementation of a dual-element atom array with individual control of single rubidium and cesium atoms. We demonstrate the independent placement, cooling, and imaging of the two elements in arbitrary geometries with up to 512 sites and observe negligible crosstalk between them, thereby providing access to multiple qubit modalities [1]. This allows us to operate the array in an uninterrupted manner without any off-time, providing pathways to continuously operating quantum processors and sensors. We discuss these results and their implications for ancilla-assisted protocols such as efficient preparation of highly-entangled states and novel crosstalk-free measurement.