  Effects of a Bohmian type quantum-relativistic theory are explored. The model
is obtained by introducing a new and independent time parameter whose relative
motions are not directly observable and cause the quantum uncertainties of the
physical observables. Unlike the usual de Broglie-Bohm theories, the Quantum
Potential does not affect directly the observable motion but it determines that
one relative to the new time variable. It turns out that the Zitterbewegung of
a free particle, of which a more general law is obtained, is the key example of
these hidden motions and, through it, it seems possible to give physical
reality to the Feynman's paths. A relativistic revision of the uncertainty
principle also derives from the theory.

General Physics