Measurement-Device-Independent Verification of Quantum Channels

Francesco Graffitti, Alexander Pickston, Peter Barrow, Massimiliano Proietti, Dmytro Kundys, Denis Rosset, Martin Ringbauer, Alessandro Fedrizzi

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)
32 Downloads (Pure)


The capability to reliably transmit and store quantum information is an essential building block for future quantum networks and processors. Gauging the ability of a communication link or quantum memory to preserve quantum correlations is therefore vital for their technological application. Here, we experimentally demonstrate a measurement-device-independent protocol for certifying that an unknown channel acts as an entanglement-preserving channel. Our results show that, even under realistic experimental conditions, including imperfect single-photon sources and the various kinds of noise-in the channel or in detection-where other verification means would fail or become inefficient, the present verification protocol is still capable of affirming the quantum behavior in a faithful manner with minimal trust on the measurement device.

Original languageEnglish
Article number010503
JournalPhysical Review Letters
Issue number1
Early online date2 Jan 2020
Publication statusPublished - 10 Jan 2020

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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