Device-independent quantum key distribution with single-photon sources

Janek Kolodynski, Alejandro Máttar, Paul Skrzypczyk, Eric Woodhead, Daniel Cavalcanti, K Banaszek, Antonio Acín

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

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Abstract

Device-independent quantum key distribution} protocols allow two honest users to establish a secret key with minimal levels of trust on the provider, as security is proven without any assumption on the inner working of the devices used for the distribution. Unfortunately, the implementation of these protocols is challenging, as it requires the observation of a large Bell-inequality violation between the two distant users. Here, we introduce novel photonic protocols for device-independent quantum key distribution exploiting single-photon sources and heralding-type architectures. The heralding process is designed so that transmission losses become irrelevant for security. We then show how the use of single-photon sources for entanglement distribution in these architectures, instead of standard entangled-pair generation schemes, provides significant improvements on the attainable key rates and distances over previous proposals. Given the current progress in single-photon sources, our work opens up a promising avenue for device-independent quantum key distribution implementations.
Original languageEnglish
Article number260 (2020)
Number of pages20
JournalQuantum
Volume4
DOIs
Publication statusPublished - 30 Apr 2020

Structured keywords

  • Bristol Quantum Information Institute
  • QITG

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