  Quantum imaging has been demonstrated since 1995 by using entangled photon
pairs. The physics community named these experiments "ghost image", "quantum
crypto-FAX", "ghost interference", etc. Recently, Bennink et al. simulated the
"ghost" imaging experiment by two co-rotating k-vector correlated lasers. Did
the classical simulation simulate the quantum aspect of the "ghost" image? We
wish to provide an answer. In fact, the simulation is very similar to a
historical model of local realism. The goal of this article is to clarify the
different physics behind the two types of experiments and address the
fundamental issues of quantum theory that EPR was concerned with since 1935.
