In this work, we investigate generalized coupled nonlinear Klein-Gordon equations with damping and source terms initial-boundary value conditions, in a bounded domain. We obtain decay of solutions by use Nakao inequality. The blow up negative initial energy is also established.

With the help of an analogy with a double-slit experiment, it is shown that the standard method of calculation of the rate of an interaction process by adding the rates of production of all the allowed final states, regardless of a possible coherence among them, is correct. It is a consequence of causality. The claims that the GSI time anomaly is due to the mixing of neutrinos in the final stat...