Adaptive versus non-adaptive strategies for quantum channel discrimination

Details Adaptive versus non-adaptive strategies for quantum channel discrimination Adaptive versus non-adaptive strategies for quantum channel discrimination

2009-09-01

arxiv.org/abs/0909.0256v1

Phys. Rev. A 81, 032339 (2010)

Physics

Quantum Physics

11 pages

Scientific paper

We provide a simple example that illustrates the advantage of adaptive over non-adaptive strategies for quantum channel discrimination. In particular, we give a pair of entanglement-breaking channels that can be perfectly discriminated by means of an adaptive strategy that requires just two channel evaluations, but for which no non-adaptive strategy can give a perfect discrimination using any finite number of channel evaluations.

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