Unambiguous discrimination between two unknown qudit states

Details Unambiguous discrimination between two unknown qudit states Unambiguous discrimination between two unknown qudit states

2011-05-16

arxiv.org/abs/1105.3004v2

Physics

Quantum Physics

8 pages, 3 figures

Scientific paper

10.1007/s11128-011-0327-x

We consider the unambiguous discrimination between two unknown qudit states in $n$-dimensional ($n\geqslant2$) 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.

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