Testing the quantum superposition principle: matter waves and beyond

Matteo Carlesso, A. Bassi

Markus Arndt, Klaus Hornberger

Marko Toroš, Giulio Gasbarri, Angelo Bassi

Matter-wave interferometry is a direct test of the quantum superposition principle for massive systems, and of collapse models. This is in contrast to non-interferometric tests, which are currently able to test collapse models more efficiently. However these bounds are in general model-dependent. Here we show that the bounds placed by matter-wave interferometry do not depend significantly on the type of collapse model. We also compute the current bounds, provided by the KDTLI 2013 experiment of Arndt's group.

Nadine Dörre

I will discuss recent advances in matter-wave experiments which exploit the quantum delocalization of nanoparticles. De Broglie wave interferometers allow tests of the quantum superposition principle for mesoscopic objects and new avenues to molecule metrology.

Arthur L. Robinson

Björn Schrinski, Stefan Nimmrichter, Klaus Hornberger

The authors use interference experiments with delocalized molecules and Bose-Einstein-Condensates to probe the quantum superposition principle. The degree of macroscopicity reached can be quantified by a Bayesian hypothesis test based on the direct measurement data.