The 4th PhyNuBE school, organized by the French low-energy nuclear physics community (GDR RESANET), took place in Aussois from May 17 to 22, 2026. The school focused on innovative technologies, theories, and methodologies in nuclear physics, with sessions dedicated to machine learning, Bayesian methods, quantum computing, quantum sensors, storage rings, and the study of open quantum systems. The LPC was strongly represented, with members contributing to the organizing committee, delivering lectures and tutorials, and presenting both oral and poster contributions.