Developing a heterogeneous cryogenic quantum platform combining neutral atoms and superconducting circuits

Neutral atoms and superconducting circuits feature complementary strengths for quantum information processing. Namely, circuits offer gigahertz clock speeds, while atoms feature multi-second coherence times and reconfigurability. A platform that combines the two would enable a distributed hybrid architecture where long-coherence neutral-atom arrays provide long-lived memory while superconducting circuits execute nanosecond-scale quantum operations. The platform would also enable millimeter-wave photon sensors with long memory and quantum processing power. We present progress towards a cryogenic hybrid experiment that will combine a reconfigurable rubidium atom array with a transmon-qubit processor, both housed in a single dilution refrigerator, linked by millimeter-wave (mm-wave) flying qubits.