  Quantum diagrams are the best language for Quantum Mechanics since they show
not only a final result but also the physical process which leads to the
result. The quantum correlation at a distance better known as the
Einstein-Podolsky-Rosen paradox may be easily understood being depicted in the
time-ordered quantum diagrams. In the diagrams one can clearly see what the
so-called entangled quantum states really are and how they contribute to the
violation of Bell inequality. The wave function phase relations that are the
actual physical "common cause in the past" for the observed correlation become
also visual and evident. Thus the diagram analysis shows that the phenomenon of
distant quantum correlation has simple causal and local explanation and there
is no need to invent various extravagant constructions contradicting the
established physical principles as well as usual common sense considerations.
