4.8 Article

Self-Testing Entangled Measurements in Quantum Networks

期刊

PHYSICAL REVIEW LETTERS
卷 121, 期 25, 页码 -

出版社

AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.121.250507

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资金

  1. Swiss National Science Foundation (Strating Grant DIAQ, NCCR-QSIT)
  2. POLONEZ program
  3. European Union's Horizon 2020 research and innovation program under Marie Sklodowska-Curie Grant [665778]
  4. European Union's Horizon 2020 research and innovation program under Marie Sklodowska-Curie Action ROSETTA Grant [749316]
  5. European Research Council [337603]
  6. VILLUM FONDEN via the QMATH Centre of Excellence [10059]
  7. European Research Council (ERC) [337603] Funding Source: European Research Council (ERC)
  8. Marie Curie Actions (MSCA) [749316] Funding Source: Marie Curie Actions (MSCA)
  9. EPSRC [EP/J007838/1] Funding Source: UKRI

向作者/读者索取更多资源

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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