Device-independent quantum key distribution from generalized CHSH inequalities
Abstract
Device-independent quantum key distribution aims at providing security guarantees even when using largely uncharacterised devices. In the simplest scenario, these guarantees are derived from the CHSH score, which is a simple linear combination of four correlation functions. We here derive a security proof from a generalisation of the CHSH score, which effectively takes into account the individual values of two correlation functions. We show that this additional information, which is anyway available in practice, allows one to get higher key rates than with the CHSH score. We discuss the potential advantage of this technique for realistic photonic implementations of device-independent quantum key distribution. Show more
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https://doi.org/10.3929/ethz-b-000493926Publication status
publishedExternal links
Journal / series
QuantumVolume
Pages / Article No.
Publisher
Verein zur Förderung des Open Access Publizierens in den QuantenwissenschaftenOrganisational unit
03781 - Renner, Renato / Renner, Renato
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Is new version of: http://hdl.handle.net/20.500.11850/447693
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