Software for Closed-loop Optimal Control in Neutral Atom Experiments

We present a software suite for closed-loop optimal control of quantum gates in neutral atom experiments with optical qubits. In closed-loop control, the experimental control parameters are found based on measurement feedback from the quantum device [1, 2].

In our case, the type and number of measurements taken are chosen adaptively based on the previous measurements to reduce the required total number of runs for the quantum device. We explore various feedback functions and optimization strategies to account for realistic noise processes, such as fluctuations and slow drifts in the experimental parameters. Our goal is to improve gate fidelities in situations where the limiting experimental imperfections are either unknown or cannot be directly reduced.

[1] Wittler, Nicolas, et al. "Integrated tool set for control, calibration, and characterization of quantum devices applied to superconducting qubits." Physical Review Applied 15.3 (2021): 034080.

[2] Rossignolo, Marco, et al. "QuOCS: The quantum optimal control suite." Computer Physics Communications 291 (2023): 108782.