Optimal discrimination of mixed quantum states involving inconclusive results

Details Optimal discrimination of mixed quantum states involving inconclusive results Optimal discrimination of mixed quantum states involving inconclusive results

2002-08-20

arxiv.org/abs/quant-ph/0208126v1

Phys. Rev. A 67, 012321 (2003).

Physics

Quantum Physics

5 pages, 1 figure

Scientific paper

10.1103/PhysRevA.67.012321

We propose a generalized discrimination scheme for mixed quantum states. In the present scenario we allow for certain fixed fraction of inconclusive results and we maximize the success rate of the quantum-state discrimination. This protocol interpolates between the Ivanovic-Dieks-Peres scheme and the Helstrom one. We formulate the extremal equations for the optimal positive operator valued measure describing the discrimination device and establish a criterion for its optimality. We also devise a numerical method for efficient solving of these extremal equations.

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