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Optimal generalized quantum measurements for arbitrary spin systems

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Positive-operator-valued measurements on a finite number of N identically prepared systems of arbitrary spin J are discussed. Pure states are characterized in terms of Bloch-like vectors restricted by a SU(2J+1) covariant constraint. This representation allows for a simple description of the equations to be fulfilled by optimal measurements. We explicitly find the minimal positive-operator-valued measurement for the N=2 case, a rigorous bound for N=3, and set up the analysis for arbitrary N.

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Reproducció digital del document publicat en format paper, proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevA.61.022113

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Physical Review A, 2000, vol. 61, núm. 2.

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Articles publicats en revistes (Física Quàntica i Astrofísica)

# metadata.dc.title[].value
Optimal generalized quantum measurements for arbitrary spin systems