A top-down versus a bottom-up hidden-variables description of the   Stern-Gerlach experiment
  We employ the Stern-Gerlach experiment to highlight the basics of a minimalist, non-interpretational top-down approach to quantum foundations. Certain benefits of the here highlighted "quantum structural studies" are detected and discussed. While the top-down approach can be described without making any reference to the fundamental structure of a closed system, the hidden variables theory ?a la Bohm proves to be more subtle than it is typically regarded. 
M. Arsenijevic, J. Jeknic-Dugic, M. Dugic
quant-ph