Unambiguous discrimination of mixed states

Terry Rudolph, Robert W. Spekkens, Peter Shipley Turner

Research output: Contribution to journalArticle (Academic Journal)peer-review

22 Citations (Scopus)


We present the conditions under which probabilistic error-free discrimination of mixed states is possible, and provide upper and lower bounds on the maximum probability of success for the case of two mixed states. We solve certain special cases exactly, and demonstrate how the problems of state filtering and state comparison can be recast as problems of mixed state unambiguous discrimination.
Original languageEnglish
JournalPhysical Review A: Atomic, Molecular and Optical Physics
Publication statusPublished - 11 Mar 2003

Bibliographical note

4.1 pages, crucial typos fixed. Final version, to be published in Phys. Rev. A (Rapid Comm)


  • quant-ph


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