A tale of two measurements

The goal of quantum metrology is to understand how to make the best usage of resources when carrying out a measurement. It is not hard to conceive scenarios in which this task demands a certain degree of collaboration among partners, which may be connected by sharing quantum states.

This talk is devoted to an overview of our recent experiments that have looked at this problem under different angles. We will discuss advantages and limitations of intervening with non-projective measurements during evolution in underconstrained models. Further, we will add considerations on privacy and security of distributed measurements.