A Cavity-Coupled Rydberg Atom Array Platform for Quantum Computing*

Rydberg arrays are an attractive platform for quantum computing due to rapid increases in gate fidelities (≲99.9%), qubit number (256), and qubit connectivity (any-to-any). Two main challenges remain: fast nondestructive state readout and scaling beyond individual modules. We present our hardware platform for Rydberg quantum computing to eventually address both by coupling a 1D array of Rb⁸⁷ atoms to a high-finesse optical cavity system. We then propose a fast readout method for error diagnosis that will take advantage of our platform’s unique capabilities. This proposal relies on dynamically coupling atoms to the cavity, nondestructive μs global cavity readout and binary search to identify errors. We will validate the efficacy of our error diagnosis proposal with fluorescence imaging. In future work, single qubit rotations for error correction, helper qubits and Rydberg-mediated CNOT gates will be developed.