  One of the most intriguing aspects of Quantum Mechanics is the impossibility
of measuring at the same time observables corresponding to non-commuting
operators. This impossibility can be partially relaxed when considering joint
or sequential weak values evaluation. Indeed, weak measurements have been a
real breakthrough in the quantum measurement framework that is of the utmost
interest from both a fundamental and an applicative point of view. Here we show
how we realized, for the first time, a sequential weak value evaluation of two
incompatible observables on a single photon.
