Self-Testing Entangled Measurements in Quantum Networks

TY - JOUR

T1 - Self-Testing Entangled Measurements in Quantum Networks

AU - Renou, Marc Olivier

AU - Kaniewski, Jȩdrzej

AU - Brunner, Nicolas

PY - 2018

Y1 - 2018

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=85059064145&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.121.250507

DO - 10.1103/PhysRevLett.121.250507

M3 - Journal article

C2 - 30608820

AN - SCOPUS:85059064145

SN - 0031-9007

VL - 121

JO - Physical Review Letters

JF - Physical Review Letters

IS - 25

M1 - 250507

ER -