Neutral Atom Array Quantum Processor with Integrated Sensing and Fidelity Control
Artem Zhutov
Rydberg atom arrays are a leading platform for building programmable quantum processors. Recent progress has demonstrated coherent control over arrays of 6100 atoms. However, as the number of controlled particles increases, achieving scalable control becomes a central challenge that requires precise mitigation of environmental and hardware imperfections that degrade gate performance. Here we develop an integrated neutral-atom array platform for quantum information processing that incorporates quantum sensing directly into the processor.
Each atom functions as a local magnetometer: through site-resolved Ramsey spectroscopy we image magnetic fields across a 260 μm × 160 μm region with 3 μm spatial resolution. We then apply computed corrections that homogenize the electromagnetic environment, enabling uniform global microwave single-qubit rotations. Next, we introduce a hardware-aware simulation framework to evaluate control architectures for Raman-based hyperfine qubit control, predicting a single-qubit gate infidelity of 8.80 × 10⁻⁵, below the 10⁻⁴ fault-tolerance threshold. For Rydberg entangling gates, we apply linear-response theory to map laser phase noise directly to gate infidelity, enabling fast phase-noise engineering tailored to specific control protocols.
Finally, we employ quantum optimal control informed by ab initio noise models to design robust pulses that outperform analytical benchmark protocols.
Location
RAC 2009