There is a good explanation of the idea here. Worth a read for those still perplexed by God playing dice. “To de Broglie, the double-slit experiment didn’t require an abstract, mysteriously collapsing wave function. Instead, he conceived of a real particle riding on a real pilot wave. The particle passes like driftwood through one slit or the other in the double-slit screen, even as the pilot wave passes through both. On the other side, the particle goes where the two wavefronts of the pilot wave constructively interfere and doesn’t go where they cancel out. “

Famous Experiment Dooms Pilot-Wave Alternative to Quantum Weirdness | Quanta Magazine

Link: https://www.quantamagazine.org/f

Oil droplets guided by “pilot waves” have failed to reproduce the results of the quantum double-slit experiment, crushing a century-old dream that there exists a single, concrete reality.