  It is possible to construct a classical, macroscopic system which has a
mathematical structure that is exactly the same as that of a quantum mechanical
system and which can be put into a state which is identical to quantum
mechanical entanglement. This paper presents a simple example, including a way
in which the system can be measured to violate Bell's inequalities. This
classical simulation of a quantum system allows us to visualize entanglement
and also helps us to see what aspects of quantum mechanical systems are truly
nonclassical.
