  Present quantum Monte Carlo codes use statistical techniques adapted to find
the amplitude of a quantum system or the associated eigenvalues. Thus, they do
not use a true physical random source. It is demonstrated that, in fact,
quantum probability admits a description based on a specific class of random
process at least for the single particle case. Then a first principle Monte
Carlo code that exactly simulates quantum dynamics can be constructed. The
subtle question concerning how to map random choices in amplitude interferences
is explained. Possible advantages of this code in simulating single hit
experiments are discussed.
