Why does such a successful theory like Quantum Mechanics have so many mysteries? The history of this is replete with dubious interpretations and controversies, yet knowledge its predictions, however, contributed to the amazing technological revolution last hundred years. In very beginning Einstein pointed out that there was something missing, due contradictions relativity theory. So, even thoug...

Quantum mechanics is one of the most surprising sides of modern physics. Its basic precepts require only undergraduate or early graduate mathematics; but because quantum mechanics is surprising, it is more difficult than these prerequisites suggest. Moreover, the rigorous and clear rules of quantum mechanics are sometimes confused with the more difficult and less rigorous rules of quantum field...

Local hidden variable theories are known to be inconsistent with quantum mechanics at the microscopic level, from the Bell inequalities @1#. Experimental tests at this level have decided in favor of quantum mechanics @2#, although there are still some experimental problems with low detection efficiency. The situation is different as particle numbers increase. There are no macroscopic tests of q...