Abstract
We present an experimental demonstration of a quantum key distribution protocol using coherent polarization states. Post selection is used to ensure a low error rate and security against beam-splitting attacks even in the presence of high losses. Signal encoding and readout in polarization bases avoids the difficult task of sending a local oscillator with the quantum channel. This makes our setup robust and easy to implement. A shared key was established for losses up to 64%.
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03.67.-a; 03.67.Dd; 42.50.Lc; 42.50.-p
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Lorenz, S., Korolkova, N. & Leuchs, G. Continuous-variable quantum key distribution using polarization encoding and post selection. Appl. Phys. B 79, 273–277 (2004). https://doi.org/10.1007/s00340-004-1574-7
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DOI: https://doi.org/10.1007/s00340-004-1574-7