Unambiguous discrimination between two unknown qudit states

Unambiguous discrimination between two unknown qudit states 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 can unambiguously discriminate between two unknown states with optimal probability of success. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Quantum Information Processing Springer Journals

Unambiguous discrimination between two unknown qudit states

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Publisher
Springer Journals
Copyright
Copyright © 2011 by Springer Science+Business Media, LLC
Subject
Physics; Quantum Information Technology, Spintronics; Quantum Computing; Data Structures, Cryptology and Information Theory; Quantum Physics; Mathematical Physics
ISSN
1570-0755
eISSN
1573-1332
D.O.I.
10.1007/s11128-011-0327-x
Publisher site
See Article on Publisher Site

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 can unambiguously discriminate between two unknown states with optimal probability of success.

Journal

Quantum Information ProcessingSpringer Journals

Published: Nov 9, 2011

References

  • A generalized programmable unambiguous state discriminator for unknown qubit systems
    He, B.; Bergou, J.A.

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