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Working paper

New general lower and upper bounds under minimum-error N quantum states discrimination

quant-ph. Series arXiv.org. Cornell University, 2021. No. arXiv:2105.06076.
For the optimal success probability under minimum-error discrimination of N≥2 arbitrary quantum states, we find new general lower and upper bounds and specify the relations between these new general bounds and the general bounds known in the literature. The new upper bound explicitly generalizes to N>2 the form of the Helstrom bound. For N=2, each of our new bounds, lower and upper, reduces to the Helstrom bound.