Device-Independent Certification of Entangled Measurements

Rafael Rabelo*, Melvyn Ho, Daniel Cavalcanti, Nicolas Brunner, Valerio Scarani

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

49 Citations (Scopus)

Abstract

We present a device-independent protocol to test if a given black-box measurement device is entangled, that is, has entangled eigenstates. Our scheme involves three parties and is inspired by entanglement swapping; the test uses the Clauser-Horne-Shimony-Holt Bell inequality, checked between each pair of parties. In the case where all particles are qubits, we characterize quantitatively the deviation of the measurement device from a perfect Bell-state measurement.

Original languageEnglish
Article number050502
Number of pages4
JournalPhysical Review Letters
Volume107
Issue number5
DOIs
Publication statusPublished - 25 Jul 2011

Keywords

  • QUANTUM
  • INEQUALITY
  • VIOLATION
  • THEOREM
  • STATES

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