Minimal Optimal Generalized Quantum Measurements
José Ignacio Latorre, Pedro J. Pascual, R. Tarrach · Physical Review Letters · 1998
Optimal and finite positive operator valued measurements on a finite number $N$ of identically prepared systems have recently been presented. With physical realization in mind, we propose here optimal and minimal generalized quantum measurements for two-level systems. We explicitly construct them up to $N\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}7$ and verify that they are minimal up to $N\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}5$.