Optimal generalized quantum measurements for arbitrary spin systems
Quantum Physics
2009-10-31 v1
Abstract
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.
Cite
@article{arxiv.quant-ph/9904056,
title = {Optimal generalized quantum measurements for arbitrary spin systems},
author = {A. Acin and J. I. Latorre and P. Pascual},
journal= {arXiv preprint arXiv:quant-ph/9904056},
year = {2009}
}
Comments
LateX, 12 pages