A compact derivation of quantum potential in de Broglie-Bohm theory

In the stochastic electrodynamics, various quantum effects on particles are supposed to emerge from the interactions of the particles with the fluctuating background field. We have adopted the same supposition and further supposed that the quantum potential arises from the velocity fluctuations of particles around their local averages. Based on these suppositions we have derived the expression of the quantum potential in the framework of de Broglie-Bohm theory, which is a reformulation of Schroedinger's. Thus we are allowed to use the wave functions and Schroedinger operators explicitly so that we have been able to derive the quantum potential in simpler and more compact manner as compared with the stochastic electrodynamics's. A new hydrodynamical version of Schroedinger equation is also presented, which has been found in the course of our study. (author)