Abstract
The relevance that the property of complete positivity has had in the determinationof quantum structures is briefly reviewed, together with recent applications toneutron optics and quantum Brownian motion. A possible useful application andgeneralization of this property to the description of macroscopic systems inquantum mechanics is discussed on the basis of recent work on the derivationof subdynamics in the Heisenberg picture of slowly varying degrees of freedominside nonrelativistic quantum field theory.
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Vacchini, B. Complete Positivity and Subdynamics in Quantum Field Theory. International Journal of Theoretical Physics 39, 927–932 (2000). https://doi.org/10.1023/A:1003647401423
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DOI: https://doi.org/10.1023/A:1003647401423