Harrigan and Spekkens (HS, 2007) provide a precise account of what it means to give an ontological model of an operational theory. In their framework, an ontological model specifies the possible ontic states of a system, where the ontic state is…

I argue that there is a common theme in the later Ludwig Wittgenstein, in Philip Frank and Otto Neurath:

Part II: Optimal LOCC implementations of Gaussian quantum channels for quantum gravity

While the spontaneous emission from independent emitters provides spatially uncorrelated photons—a typical manifestation of quantum randomness, the interference of the coherent scattering leads to a well-defined intensity pattern—a feature described…