Estimates of non-optimality of quantum measurements and a simple iterative method for computing optimal measurements

Details Estimates of non-optimality of quantum measurements and a simple iterative method for computing optimal measurements Estimates of non-optimality of quantum measurements and a simple iterative method for computing optimal measurements

2009-02-03

arxiv.org/abs/0902.0395v2

Physics

Quantum Physics

The optimality condition in the prevoius version had already been shown by Holevo. The bounds on non-optimality and convergenc

Scientific paper

We construct crude estimates for non-optimality of quantum measurements in
terms of their violation of Holevo's simplified minimum-error optimality
conditions. As an application, we show that a modification of Barnett and
Croke's proof of the optimality conditions yields a convergent iterative scheme
for computing optimal measurements.

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