Now, two studies, published Dec. 15 in the journals Nature and Physical Review Letters, have proved Schrödinger wrong. By a relatively simple experiment, they show that if quantum mechanics is correct, imaginary numbers are a necessary part of the mathematics of our universe.Sounds big, right?
One source sends an entangled pair of photons into nodes A and B, while another sends a pair into B and C. Experiment showed that the photons in A and C were uncorrelated.
No surprise here. I am sure that no one expected correlations from light from different and unrelated sources.
Somehow this shows that some hypothetical real-number variant of quantum mechanics is wrong.
I did not follow the details, but apparently their real-number variant is a nonlocal theory. No one has discovered any experiment with this sort of nonlocal properties. Why did they bother doing any experiment? A nonlocality result like this would be one of the most important in the history of science.
Maybe they should have tested a real-number quantum with locality similar to quantum mechanics.
Quantum mechanics does use complex numbers. You could do all the calculations with real numbers if you wanted to, but there would be no point.