Are Quantum Mechanics and Relativity Theory really Compatible?
Keywords: quantum mechanics, relativity theory, compaticle, gravitation, space-time metric
In this paper we discuss some aspects of quantum nonseparability related to the theory of relativity. It is argued that Quantum Mechanics (QM) and Special Relativity (SR) are incompatible unless the so-called Projection Postulate is given up. We also discuss the philosophy underlying decoherence models based on gravitation, in particular the nature of fluctuations of the space-time metric.