  The belief propagation algorithm has been recognized in the information
theory community as a soft-decision iterative decoding algorithm. It is the
most powerful algorithm found so far for attacking hard optimization problems
in channel decoding. Quantum mechanics is the foundation of modern physics with
the time-independent Schrodinger equation being one of the most important
equations. This paper shows that the equation can be derived from a generalized
belief propagation algorithm. Such a connection on a mathematical basis might
shed new insights into the foundations of quantum mechanics and quantum
computing.
