Random motions at the velocity of light and relativistic quantum mechanics
With the physical hypothesis of the existence of a covariant subquantum vacuum, Dirac's aether, the authors show that: (i) the idea that subquantum random jumps occur at the velocity of light is a consequence of the introduction of stochastic fluctuations into the gmu nu field of general relativity and (ii) the Klein-Gordon equation can be deduced, in a new simple way, from a stochastic process on the set of the four possible space-time directions of the velocity of light.