MG11 
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Space-time fluctuations an inertia

The effects upon the Klein-Gordon field of nonconformal stochastic metric fluctuations are analyzed. We characterize the stochastic properties of the fluctuations by gaussian white noise. These fluctuations lead to an effective mass which is different from the 'bare' mass. We show that our model also implies violation of the weak equivalence principle. Finally, we give rough estimates about the magnitude of the space-time fluctuations.