Yes: http://www.nature.com/nature/journal/v461/n7263/full/nature08363.htmlDadface said:What I would like to know is whether experiments on properties other than polarisation have been carried out.
Dadface said:As I understand it most, if not all, experiments carried out to test Bells theorem test the local hidden variables assumption that photons have definite polarisations. What I would like to know is whether experiments on properties other than polarisation have been carried out. If not are there any properties that in principle can be tested?
Dadface said:Thank you very much DrClaude and DrChinese. Am I correct in assuming that all of these experiments test the local realism assumption that light or macro particles or whatever it is being investigated have definite properties?
Bell's Theorem is a fundamental principle in quantum mechanics that states that certain predictions made by quantum mechanics cannot be reproduced by any classical theory. It is important because it challenges our understanding of the universe and has implications for our understanding of causality, locality, and determinism.
A test of Bell's Theorem is an experiment designed to test the validity of the principle. It is typically performed using entangled particles, which are particles that are intrinsically connected and can affect each other's properties even when separated by large distances. The experiment involves measuring the properties of these particles and comparing the results with predictions made by classical theories.
The results of tests of Bell's Theorem have consistently shown that the predictions of quantum mechanics are correct and cannot be explained by classical theories. This has been confirmed by numerous experiments, including those involving entangled photons and ions, and has been a major breakthrough in our understanding of the universe.
Bell's Theorem has several potential implications for our understanding of the universe. It suggests that there are hidden variables at play in quantum mechanics, which could potentially lead to a deeper understanding of the nature of reality. It also challenges our understanding of causality and locality, as the entanglement of particles suggests that information can be transmitted instantaneously over large distances.
Current developments in tests of Bell's Theorem include experiments involving larger entangled systems, such as molecules and superconductors, and attempts to close potential loopholes in previous experiments. In the future, tests of Bell's Theorem may also be used to develop new technologies, such as quantum communication and quantum computing, that rely on the principles of entanglement and non-locality.