Abstract
Probability waves in the configuration space are associated with coherent solutions of the classical Liouville or Fokker–Planck equations. Distributions localized in the momentum space provide action waves, described by the probability density and the generating function of the Hamilton–Jacobi theory. It is shown that by introducing a minimum distance in the coordinate space, the action distributions aquire the phase–space dispersion specific to the quantum objects. At finite temperature, probability density waves propagating with the sound velocity can arise as nonstationary solutions of the classical Fokker–Planck equation. The results suggest that in a system of quantum Brownian particles, a transition from complex to real probability waves could be observed.
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