Even though Einstein and Schrödinger were centrally important for the development of modern quantum physics, they never accepted quantum mechanics and its interpretation through the “Copenhagen School” as a satisfying foundational theory.

The importance of the quantum Fisher information metric is testified by the number of applications that this has in very different fields, ranging from hypothesis testing to metrology, passing through thermodynamics.

We show that the framework of general probabilistic theories can be extended to describe continuous-variable theories on phase space and that the phase-space formulation of general probabilistic theories can include a generalized time-evolution.

Novel platforms interfacing trapped cold atoms and guided light in nanoscale waveguides are a promising route to achieve a regime of strong coupling between light and atoms in single pass.