  We are presenting an internal trajectory model for a quantum particle in the
Schroedinger non-relativistic approximation. This model is based on two new
mathematical concepts: a complex analytical mechanics in Minplus complex
analysis and a periodical non random process which gives a complex Ito formula.
  This model naturally generates a concept of spin or isospin and the
Heisenberg inequalities, and leads to the Schroedinger equation using a
generalization of the least action principle adapted to the trajectories of
this type.
