Optimal generalized quantum measurements for arbitrary spin systems

Details Optimal generalized quantum measurements for arbitrary spin systems Optimal generalized quantum measurements for arbitrary spin systems

1999-04-14

arxiv.org/abs/quant-ph/9904056v1

Phys.Rev. A61 (2000) 22113

Physics

Quantum Physics

LateX, 12 pages

Scientific paper

10.1103/PhysRevA.61.022113

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(2 J+1) covariant constraint. This representation allows for a simple description of the equations to be fulfilled by optimal measurements. We explicitly find the minimal POVM for the N=2 case, a rigorous bound for N=3 and set up the analysis for arbitrary N.

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