Continuous-variable quantum key distribution using polarization encoding and 
post selection

Lorenz, S; Korolkova, N; Leuchs, G

doi:10.1007/s00340-004-1574-7

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Continuous-variable quantum key distribution using polarization encoding and post selection

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Leuchs, G
Max Planck Research Group, Max Planck Institute for the Science of Light, Max Planck Society;

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Citation

Lorenz, S., Korolkova, N., & Leuchs, G. (2004). Continuous-variable quantum key distribution using polarization encoding and post selection. APPLIED PHYSICS B-LASERS AND OPTICS, 79(3), 273-277. doi:10.1007/s00340-004-1574-7.

Cite as: https://hdl.handle.net/11858/00-001M-0000-002D-6DE4-E

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%.