A single particle, wandering the universe on its own without bumping into anything, is guided in its path by its own pilot wave and is perfectly local. But introduce a second particle that interacts in any way with the first, and suddenly they are linked—entangled—and the pilot wave of one particle will change depending on the precise location of the other particle, no matter how distant it may be. This kind of “spooky action at a distance” also appeared in the Copenhagen interpretation—it was exactly what Einstein had argued against in the EPR paper. But many physicists were still unaware of
...more
Bohm
