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Self-testing entangled measurements in quantum networks

Kaniewski, Jędrzej
Published in Physical Review Letters. 2018, vol. 121, no. 250507
Abstract Self-testing refers to the possibility of characterizing an unknown quantum device based only on the observed statistics. Here we develop methods for self-testing entangled quantum measurements, a key element for quantum networks. Our approach is based on the natural assumption that separated physical sources in a network should be considered independent. This provides a natural formulation of the problem of certifying entangled measurements. Considering the setup of entanglement swapping, we derive a robust self-test for the Bell-state measurement, tolerating noise levels up to 5%. We also discuss generalizations to other entangled measurements.
arXiv: 1807.04956
Note 15 pages, 3 figures. See also related work by J.-D. Bancal et al
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RENOU, Marc Olivier, KANIEWSKI, Jędrzej, BRUNNER, Nicolas. Self-testing entangled measurements in quantum networks. In: Physical Review Letters, 2018, vol. 121, n° 250507. doi: 10.1103/PhysRevLett.121.250507 https://archive-ouverte.unige.ch/unige:124649

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Deposited on : 2019-10-21

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