Unambiguous discrimination of mixed quantum states
- Publication Type:
- Journal Article
- Physics Letters, Section A: General, Atomic and Solid State Physics, 2006, 353 (4), pp. 300 - 306
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The problem of unambiguous discrimination between mixed quantum states is addressed by isolating the part of each mixed state which has no contribution to discrimination and by employing the strategy of set discrimination of pure states. A necessary and sufficient condition of unambiguous mixed state discrimination is presented. An upper bound of the efficiency is also derived. © 2006 Elsevier B.V. All rights reserved.
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