Origin of nonclassicality: observed state versus measurement

Alfredo Luis

Published 2017-07-07Version 1

According to Born's rule quantum probabilities are given by the overlap between the system state and measurement states. We investigate whether typical nonclassical effects such as subPoissonian statistics and quadrature squeezing should be ascribed just to the system state or to the measurement states, which are typically highly non classical by themselves: number states and infinitely squeezed states. To this end we investigate whether non classicality still holds after replacing in Born's rule number and quadrature states by classical-like states.