Finding optimal strategies for minimum-error quantum-state discrimination
Miroslav Ježek, Jaroslav Řeháček, Jaromı́r Fiurášek · Physical Review A · 2002
We propose a numerical algorithm for finding optimal measurements for quantum-state discrimination. The theory of the semidefinite programming provides a simple check of the optimality of the numerically obtained results. With the help of our algorithm we calculate the minimum attainable error rate of a device discriminating between three particularly chosen pure qubit states.