Quantum superpositions lie at the core of quantum mechanics, they are omnipresent in any quantum system and apply to all degrees of freedom. Spatial quantum superpositions are usually studied by interferometric experiments. Interference patterns have been observed for photons and also for massive particles up to the mass of 10⁴ amu. It is still an open question if mesoscopic and even macroscopic objects can in principle be observed in such spatial superpositions.

Interferometric experiments with massive objects are notoriously difficult. The purpose of this discussion meeting is to bring together experts from experimental and theoretical research to explore alternative non-interfrometric experiments, to test the quantum superposition principle in the mesoscopic domain, and at the same time to test alternative models, which explicitly predict a violation of quantum linearity.

Web site: http://www.qmts.it/2015/noninterferometric