We are happy to announce our next seminar.
Speaker: Giovanni Chesi (INFN Pavia)
When: Thursday, 17th November 2022, 9:30 AM (CET)
Where: Aula Caldirola
Title: A general protocol for global multiphase estimation
Abstract: In principle, global estimation strategies allow to extract information on a phase or a set of phases without any prior knowledge about them. However, unlike the local estimation case, a global multiphase estimation strategy does not exist yet. We devised a protocol based on Holevo’s estimation theory that straightforwardly generalizes global single-phase estimation strategies to the multiphase scenario. We exploit our protocol to investigate the performance of multiphase global estimation. Moreover, we show that, in the single-phase case, our protocol generalizes at least two well-known estimation strategies, i.e. the Quantum Phase Estimation Algorithm and the optimal parallel-separable strategy.