Schrödinger Equations and Diffusion Theory addresses the question
"What is the Schrödinger equation?" in terms of diffusion processes, and
shows that the Schrödinger equation and diffusion equations in duality
are equivalent. In turn, Schrödinger's conjecture of 1931 is solved. The
theory of diffusion processes for the Schrödinger equation tell us that
we must go further into the theory of systems of (infinitely) many
interacting quantum (diffusion) particles.
The method of relative entropy and the theory of transformations enable
us to construct severely singular diffusion processes which appear to be
equivalent to Schrödinger equations.
The theory of large deviations and the propagation of chaos of
interacting diffusion particles reveal the statistical mechanical nature
of the Schrödinger equation, namely, quantum mechanics.
The text is practically self-contained and requires only an elementary
knowledge of probability theory at the graduate level.