Journal
PHYSICAL REVIEW LETTERS
Volume 121, Issue 25, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.121.250507
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Funding
- Swiss National Science Foundation (Strating Grant DIAQ, NCCR-QSIT)
- POLONEZ program
- European Union's Horizon 2020 research and innovation program under Marie Sklodowska-Curie Grant [665778]
- European Union's Horizon 2020 research and innovation program under Marie Sklodowska-Curie Action ROSETTA Grant [749316]
- European Research Council [337603]
- VILLUM FONDEN via the QMATH Centre of Excellence [10059]
- European Research Council (ERC) [337603] Funding Source: European Research Council (ERC)
- Marie Curie Actions (MSCA) [749316] Funding Source: Marie Curie Actions (MSCA)
- EPSRC [EP/J007838/1] Funding Source: UKRI
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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 similar to 5%. We also discuss generalizations to other entangled measurements.
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