Fifty years after John Bell's theorem, a significant collaboration took place involving physicists Alain Aspect, John F. Clauser, and Anton Zeilinger. These researchers conducted experiments that tested the predictions of quantum mechanics and the implications of Bell's theorem, which addresses the nature of quantum entanglement and local realism.

In particular, Alain Aspect is known for his pioneering experiments in the early 1980s that provided strong evidence against local hidden variable theories, supporting the non-locality of quantum mechanics. John Clauser was also instrumental in the early tests of Bell's inequalities, and Anton Zeilinger has made substantial contributions to the field of quantum information and entanglement.

Their collective work has been crucial in advancing our understanding of quantum mechanics and has led to numerous applications in quantum computing and quantum cryptography. In 2022, they were awarded the Nobel Prize in Physics for their contributions to the foundations of quantum mechanics, particularly in relation to Bell's theorem and entanglement.