Device-independent entanglement-based Bennett 1992 protocol

Abstract

In this paper we set forth a novel connection between the Bennett 1992 protocol and a Bell inequality. This allows us to extend the usual prepare-and-measure protocol to its entanglement-based formulation. We exploit a recent result in the frame of device-independent quantum key distribution to provide a simple, model-independent, security proof for the new protocol. The minimum efficiency required for a practical implementation of the scheme is the lowest reported to date.

7 pages, 3 figures. 3nd version: published version

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• Limits on the heralding efficiencies and spectral purities of spectrally-filtered single photons from photon pair sources
• Quantum cryptography: key distribution and beyond
• Heralded generation of high-purity ultrashort single photons in programmable temporal shapes
• Continuous variable B92 quantum key distribution protocol using single photon added and subtracted coherent states
• EPR-steering: closing the detection loophole with non-maximally entangled states and arbitrary low efficiency
• Measurement-device-independent quantum key distribution with classical Bob and no joint measurement
• Loss tolerant device-independent quantum key distribution: a proof of principle