Dual science-cell architecture for scalable erbium optical tweezer arrays

We report a new apparatus that simultaneously creates erbium tweezer arrays in two independent glass cells from a single atomic oven, enabling inter-cell coupling and entanglement via photonic links. Each cell is fed by its own two-dimensional magneto-optical trap (2D MOT) operated on the 401 nm transition, with 583 nm push beams controlling and delivering cold-atom flux into the science region through differential pumping. In each glass cell, we implement three-dimensional magneto-optical traps (3D MOTs) using both 583 nm and 841 nm cooling light to increase capture efficiency and enable subsequent narrow-line cooling and preparation for tweezer loading. We describe the vacuum and optical architecture that allows simultaneous loading of tweezer arrays, as well as trapping performance toward deterministic single-atom loading in both glass cells.