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Near-maximal Polarization Entanglement for Quantum Communications at 2.1 µm

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Abstract

We demonstrate for the first time a positive secure-key rate at 2.1 µm (0.417 bits/pair, with a quantum bit error rate of 5.43%), using near-maximally entangled photons in a proof-of-principle device-independent quantum-key-distribution scenario.

© 2021 The Author(s)

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