  A deterministic model with a large number of continuous and discrete degrees
of freedom is described, and a statistical treatment is proposed. The model
exactly obeys a Schrodinger equation, which has to be interpreted exactly
according to the Copenhagen prescriptions. After applying a Hartree-Fock
approximation, the model appears to describe genuine quantum particles that
could be used as a starting point for field variables in a quantum field
theory. In the deterministic model it is essential that information loss
occurs, but the corresponding quantum system is unitary and exactly preserves
information. (To be published in Foundations of Physics Letters, Vol. 10, No
4.)
