期刊
PHYSICAL REVIEW A
卷 81, 期 3, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.81.032339
关键词
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资金
- EPSRC
- xQIT Keck fellowship
- CRC
- CFI
- ORF
- CIFAR
- NSERC
- QuantumWorks
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.
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