P. K. Aravind
Published 2001-05-09, updated 2001-09-05Version 2
Positive operator valued measures (POVMs) are presented that allow an unknown pure state of a spin-1 particle to be determined with optimal fidelity when 2 to 5 copies of that state are available. Optimal POVMs are also presented for a spin-3/2 particle when 2 or 3 copies of the unknown state are available. Although these POVMs are optimal they are not always minimal, indicating that there is room for improvement.
Comments: 12 pages, 3 figures. Some small slips have been corrected and some new references added
Journal: Quantum Information and Computation, Vol.1,No.3,pp.52-61 (2001).
Strategies to measure a quantum state
Equivalence between Entanglement and the Optimal Fidelity of Continuous Variable Teleportation
Detecting the concurrence of an unknown state with a single observable
