Optimal Measurements for Simultaneous Quantum Estimation of Multiple Phases” just published in Physical Review Letters with Editor Suggestion

Optimal Measurements for Simultaneous Quantum Estimation of Multiple Phases
The conditions for simultaneous quantum estimation of multiple parameters are derived, a desired step forward for the design of future quantum imaging and metrology devices.

Luca Pezzè, Mario A. Ciampini, Nicolò Spagnolo, Peter C. Humphreys, Animesh Datta, Ian A. Walmsley, Marco Barbieri, Fabio Sciarrino, and Augusto Smerzi
Phys. Rev. Lett. 119, 130504 (2017)