When Knut tried to to something completely different, he came across an interesting arrangement using matter-wave arrays to do inertial sensing and EM field measurements - read up here
#quantum #quantumsensing

Multi-axis inertial sensing with 2D matter-wave arrays
https://quantumsensing.de/2025/04/15/multi-axis-inertial-sensing-with-2d-matter-wave-arrays/