arXiv:quant-ph/0512142AbstractReferencesReviewsResources
Unambiguous discrimination among quantum operations
Published 2005-12-18, updated 2006-04-24Version 3
We address the problem of unambiguous discrimination among a given set of quantum operations. The necessary and sufficient condition for them to be unambiguously distinguishable is derived in the cases of single use and multiple uses respectively. For the latter case we explicitly construct the input states and corresponding measurements that accomplish the task. It is found that the introduction of entanglement can improve the discrimination.
Comments: 5 pages, no figure
Journal: Phys. Rev. A 73, 042301(2006)
Categories: quant-ph
Keywords: quantum operations, unambiguous discrimination, sufficient condition, input states, entanglement
Tags: journal article
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