TOWARDS AN OBJECTIVE QUANTUM PHYSICS

For a macrosystem a general formalism is given, inside quantum field t heory, to describe its separation from the surrounding and its time ev olution. Assuming a suitable dissipative behaviour of the time evoluti on of the separated system, an objective quantum description is extrac ted from quantum field theory, based on a natural set of non-local hid den variables. In the non-relativistic case, compatibility with usual statistical mechanics is discussed in the context of a Boltzmann descr iption; finally, the coherence is shown with the point of view of Bohr about quantum mechanics of a microsystem.