Measurement-Device-Independent Verification of Quantum Channels

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

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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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