Improved discrimination of unitaries by entangled probes

G. Mauro D'Ariano; Matteo G. A. Paris; Paoloplacido Lo Presti

Improved discrimination of unitaries by entangled probes

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arxiv quant-ph/0204050 v1 pith:QIN4SDYB submitted 2002-04-09 quant-ph

Improved discrimination of unitaries by entangled probes

G. Mauro D'Ariano , Paoloplacido Lo Presti , Matteo G. A. Paris This is my paper

classification quant-ph

keywords unitariesdiscriminationentangledprobesallowedcaseschannelconsider

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We consider the problem of discriminating among a set of unitaries by means of measurements performed on the state undergoing the transformation. We show that use of entangled probes improves the discrimination in the two following cases: i) for a set of unitaries that are the UIR of a group and, ii) for any pair of transformations provided that multiple uses of the channel are allowed.

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Cited by 1 Pith paper

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

Entanglement in quantum channel discrimination: sometimes less is more
quant-ph 2026-05 unverdicted novelty 7.0

The paper shows that for some pairs of unitary channels, perfect discrimination is possible with separable states but nearly impossible with maximally entangled states, introducing MEWC and MEBC concepts.