Soft-metric-based information reconciliation techniques for QKD

Marina Mondin; Fred Daneshgaran; Maria Delgado; Fabio Mesiti

doi:10.1117/12.858357

30 August 2010 Soft-metric-based information reconciliation techniques for QKD

Marina Mondin, Fred Daneshgaran, Maria Delgado, Fabio Mesiti

Proceedings Volume 7815, Quantum Communications and Quantum Imaging VIII; 781502 (2010) https://doi.org/10.1117/12.858357
Event: SPIE Optical Engineering + Applications, 2010, San Diego, California, United States

Abstract

This paper deals with soft-information based information reconciliation and data sifting for Quantum Key Distribution (QKD).We propose a novel composite channel model for QKD, which includes both a hard output quantum channel and a soft output classic channel. The metrics derived from the two channels are jointly processed at the receiver, exploiting capacity achieving soft-metric based iteratively decoded block codes. The performance of the proposed mixed-softmetric algorithms are studied via simulations as a function of the system parameters. The core ideas of the paper are: a) employing FEC coding as opposed to two-way communication for information reconciliation, b) exploiting all the available information for data processing at the receiver including information available from the quantum channel, since optimized use of this information can lead to significant performance improvement.

Citation Download Citation

Marina Mondin, Fred Daneshgaran, Maria Delgado, and Fabio Mesiti "Soft-metric-based information reconciliation techniques for QKD", Proc. SPIE 7815, Quantum Communications and Quantum Imaging VIII, 781502 (30 August 2010); https://doi.org/10.1117/12.858357

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