Unambiguous discrimination between two unknown qudit states

Abstract

We consider the unambiguous discrimination between two unknown qudit states in $n$-dimensional ($n⩾2$) 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.

8 pages, 3 figures

References in corpus (3)

• Optimal unambiguous discrimination of two subspaces as a case in mixed state discrimination
• Programmable quantum state discriminators with simple programs
• Multi-copy programmable discrimination of general qubit states

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