2003/04/18 by Chiara Macchiavello · 1 citation
Physics and Astronomy · #quant-ph
paper · pdf · doi:10.1103/physreva.67.062302
6 pages
arxiv created 2003/04/18 · arxiv updated 2009/12/01
We study the issue of simultaneous estimation of several phase shifts induced by commuting operators on a quantum state. We derive the optimal positive operator-valued measure corresponding to the multiple-phase estimation. In particular, we discuss the explicit case of the optimal detection of double phase for a system of identical qutrits and generalise these results to optimal multiple phase detection for d-dimensional quantum states.