Curator's Take
This article demonstrates a fully FPGA‑based control loop that removes the PC from the feedback path, cutting the latency to just 282 µs and enabling on‑the‑fly rearrangement of neutral‑atom qubits with >95 % success for ten‑atom defect‑free arrays. By integrating photon counting, decision logic and waveform synthesis in a single PXIe chassis, the work provides the real‑time infrastructure needed for mid‑circuit measurement and quantum error‑correction cycles—capabilities that have been bottlenecks for scaling neutral‑atom platforms. The results build directly on recent advances in optical tweezer loading and show how modular, low‑latency electronics can bridge the gap between laboratory demonstrations and fault‑tolerant quantum processors.
— Mark Eatherly
Summary
The scalability of neutral atom quantum computing demands integrated electronic control systems with low latency, modular architecture, and real-time feedback capability. Here, we present an FPGA-based electronic control system that eliminates the PC from the feedback loop, integrating photon counting, real-time decision-making, and waveform generation within a unified PXIe architecture. The system achieves a total feedback latency of $282\,\mathrm{μs}$ and is validated in practical experiments by assembling defect-free atom arrays from 24 stochastically loaded optical tweezers. A single-round rearrangement achieves a filling fraction of $\sim96\%$, while feedback-controlled iterative rearrangement over five rounds boosts the success probability for generating a 10-atom defect-free array from $65.7\%$ to $95.4\%$. This system establishes the electronic infrastructure necessary for mid-circuit measurement and real-time quantum error correction on neutral-atom platforms.