Local distinguishability of multipartite orthogonal quantum states

J Walgate, A J Short, L Hardy, V Vedral

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

380 Citations (Scopus)


We consider one copy of a quantum system prepared in one of two orthogonal pure states, entangled or otherwise, and distributed between any number of parties. We demonstrate that it is possible to identify which of these two states the system is in by means of local operations and classical communication alone. The protocol we outline is both completely reliable and completely general; it will correctly distinguish any two orthogonal states 100% of the time.

Original languageEnglish
Pages (from-to)4972-4975
Number of pages4
JournalPhysical Review Letters
Issue number23
Publication statusPublished - 4 Dec 2000


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