Unambiguous discrimination between two unknown qudit states

الأصل · EN

We consider the unambiguous discrimination between two unknown qudit states in n-dimensional (n2) Hilbert space. By equivalence of unknown pure states to known mixed states and with the Jordan-basis method, we demonstrate that the optimal success probability of the discrimination between two unknown states is independent of the dimension n. We also give a scheme for a physical implementation of the programmable state discriminator that unambiguously discriminate between two unknown states with optimal probability of success.