Lower bound on inconclusive probability of unambiguous discrimination
Yuan Feng, Shengyu Zhang, Runyao Duan, Mingsheng Ying · Physical Review A · 2002
We derive a lower bound on the inconclusive probability of unambiguous discrimination among n linearly independent quantum states by using the constraint of no signaling. It improves the bound presented in the paper of Zhang, Feng, Sun, and Ying [Phys. Rev. A 64, 062103 (2001)], and when the optimal discrimination can be reached, these two bounds coincide with each other. An alternative method of constructing an appropriate measurement to prove the lower bound is also presented.