Post-Experiment Forensics and Human-in-the-Loop Interventions in Explainable Autonomous Scanning Probe Microscopy

Abstract: The broad adoption of ML-based automated and autonomous experiments (AE) in physical characterization and synthesis requires development of strategies for understanding and intervention in the experimental workflow. Here, we introduce and realize strategies for post-acquisition forensic analysis applied to the deep kernel learning based AE scanning probe microscopy. This approach yields real-time and post-acquisition indicators of the progression of an active learning process interacting with an experimental system. We further illustrate that this approach can be extended towards human-in-the-loop autonomous experiments, where human operators make high-level decisions at high latencies setting the policies for AE, and the ML algorithm performs low-level fast decisions. The proposed approach is universal and can be extended to other physical and chemical imaging techniques and applications such as combinatorial library analysis. The full forensic analysis notebook is publicly available on GitHub at https://github.com/yongtaoliu/Forensics-DKL-BEPS.