Macroscopicity of mechanical quantum superpositions

The goal of the research project is to scrutinize and validate a measure for the macroscopicity of mechanical quantum superpositions, as introduced recently by the PI's group, with regard to general many-particle states and to non-interferometric quantum tests. Specifically, we will refine the measure as a general hypothesis test within a Bayesian framework, and evaluate it for current and planned experiments involving e.g. collective excitations of cold quantum gases, elastic deformations of nanoscale solids, or Leggett-Garg violations in optical lattices. We thus hope to provide a standard for the comparison of diverse quantum experiments probing the transition to macroscopic physics.

DFG Programme Research Grants