Towards a Dual Species Optical Tweezer Array of Neutral Atoms

Optical tweezer arrays of neutral atoms have emerged as a promising platform to explore quantum science. This platform is scalable, highly configurable and offers individual control of the atoms. Together with long-range interaction via excitation to Rydberg states, these arrays offer a highly flexible platform to simulate quantum spin models or perform gates for quantum computation. Dual species arrays can further add to the toolbox allowing for schemes that involve two different types of particles. This differentiation into two species is naturally useful for quantum error correction, which requires both data and measurement qubits, and is also the foundation for measurement-based preparation of novel states of matter. We present work towards realizing a two-dimensional dual species optical tweezer array using Na and Cs atoms. Through the choice of the Rydberg state used, the relative interaction strengths between Na-Na, Cs-Cs and Na-Cs atoms can be tuned. In particular, we have identified states which allow for a large Na-Cs interaction while keeping Na-Na and Cs-Cs interactions small, which is of particular interest to many of the schemes discussed above. We use a static pattern of spatial light modulator traps, which are ideal for their geometric flexibility. After a stochastic loading process, we rearrange the atoms using mobile tweezer traps formed from acousto-optic deflectors to an array of interest.