An atom-array cavity-array platform

Neutral atom arrays are a leading platform for quantum computation and simulation, offering identical qubits, programmability, and reconfigurable interactions. Integrating atom-arrays with photonic interfaces, like cavities, can enable sub-microsecond qubit readout, efficient atom-photon entanglement, and enable new quantum simulation capabilities through long-range interactions. However, scalable and efficient integration of atom-arrays with such photonic interfaces remains a major challenge.

We present an atom-array cavity-array platform integrating cesium atom arrays with a photonic chip containing over 100 nanophotonic cavities. To enable this, we develop: (1) a background-free imaging scheme using excited-state transitions in cesium with >99% fidelity, (2) a photonic chip design optimized for efficient atom loading, and (3) a free-space coupling scheme achieving >65% waveguide-to-fiber coupling efficiency.

We demonstrate collisional-blockade limited loading of atom array next to photonic chip, parallel transport of atoms to multiple cavities, and achieving atom-cavity separations as small as 300 nm. At these distances, atom-photon interaction strengths exceeding 1 GHz are achievable. We present these capabilities along with our efforts toward single-photon extraction through atom-cavity coupling. These results address key integration challenges and pave the way for quantum networking and distributed quantum computing.