Phys. Rev. Lett. 102, 160502 (2009) [4 pages]Experimental Quantum Process DiscriminationSee Also: Publisher's Note Received 10 September 2008; published 24 April 2009; corrected 28 April 2009 Discrimination between unknown processes chosen from a finite set is experimentally shown to be possible even in the case of nonorthogonal processes. We demonstrate unambiguous deterministic quantum process discrimination of nonorthogonal processes using properties of entanglement, additional known unitaries, or classical communication. Single qubit measurement and unitary processes and multipartite unitaries (where the unitary acts nonseparably across two distant locations) acting on photons are discriminated with a confidence of ≥97% in all cases. © 2009 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.102.160502
DOI:
10.1103/PhysRevLett.102.160502
PACS:
03.67.−a, 03.65.Ta, 03.65.Ud, 03.65.Wj
See AlsoPublisher's Note: Anthony Laing, Terry Rudolph, and Jeremy L. O’Brien, Publisher’s Note: Experimental Quantum Process Discrimination [Phys. Rev. Lett. 102, 160502 (2009)], Phys. Rev. Lett. 102, 189902 (2009). |
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