A dual-element, two-dimensional atom array with continuous-mode operation*

Quantum processing architectures that include multiple qubit modalities offer compelling strategies for high-fidelity operations and readout, quantum error correction, and a path for scaling to large system sizes. Such hybrid architectures have been realized for leading platforms, including superconducting circuits and trapped ions. Recently, a new approach for constructing large, coherent quantum processors has emerged based on arrays of individually trapped neutral atoms. However, these demonstrations have been limited to arrays of a single atomic element where the identical nature of the atoms makes crosstalk-free control and quantum non-demolition (QND) readout of a large number of atomic qubits challenging. In this talk I will present our latest results of a dual-element atom array with individual control of single Rb and Cs atoms. We demonstrate independent placement of the elements in arrays with up to 512 trapping sites and observe negligible crosstalk. By continuously reloading one atomic element while maintaining an array of the other, we demonstrate a new continuous operation mode for atom arrays without any off-time. I will discuss avenues for ancilla-assisted quantum protocols such as QND measurements and quantum error correction, and present our recent progress.