Adaptive versus nonadaptive strategies for quantum channel discrimination
- 31 March 2010
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 81 (3) , 032339
Abstract
We provide a simple example that illustrates the advantage of adaptive over nonadaptive 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 nonadaptive strategy can give a perfect discrimination using any finite number of channel evaluations.Keywords
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