What is realism and how can it be non-local?
arXiv:0903.4974
Abstract
The concept of realism in quantum mechanics means that results of measurement are caused by physical variables, hidden or observable. Local hidden variables were proved unable to explain results of measurements on entangled particles tested far away from one another. Then, some physicists embraced the idea of nonlocal hidden variables. The present article proves that this idea is problematic, that it runs into an impasse vis-à-vis the special relativity.
11 pages and 4 figures. This is a new version that replaced the proof in the former version which was non-satisfactory