Unitary transformations can be identified locally

Physics – Quantum Physics

Scientific paper

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6 pages, 1 figure, errors modified

Scientific paper

10.1103/PhysRevLett.99.170401

We show that in principle, $N$-partite unitary transformations can be perfectly discriminated under local measurement and classical communication (LOCC) despite of their nonlocal properties. Based on this result, some related topics, including the construction of the appropriate quantum circuit together with the extension to general completely positive trace preserving operations, are discussed.

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