TESTING MACROSCOPIC QUANTUM COHERENCE

The compatibility of Macrorealism and Quantum Mechanics is discussed in the light of some recent experimental proposals based on non-invasive measurements realized via SQUID techniques that aim at evidentiating violation of a class of Bell-like inequalities. In particular, it is pointed out that the assumption of <<non-invasivity>> with respect to a measurement process is independent of any <<macrorealistic>> assumption about physical reality and that the conjunction of both assumptions ultimately amounts to a request of classical behaviour.