Efficiency of coherent state quantum cryptography in the presence of loss: Influence of realistic error correction

2005/12/31 by Matthias Heid, Norbert Lütkenhaus · 17 citations
Computer Science · Physics and Astronomy · #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum Mechanics and Applications #quant-ph

paper · pdf · doi:10.1103/physreva.73.052316

published as Physical Review A 73, 052316 (2006) · 7 pages, 2 figures

arxiv created 2006/08/01 · arxiv updated 2009/12/01

Abstract

We investigate the performance of continuous variable quantum key distribution scheme in a practical setting. More specifically, we take non-ideal error reconciliation procedure into account. The quantum channel connecting the two honest parties is assumed to be lossy but noiseless. Secret key rates are given for the case that the measurement outcomes are postselected or a reverse reconciliation scheme is applied. The reverse reconciliation scheme loses its initial advantage in the practical setting. If one combines postselection with reverse reconciliation however, much of this advantage can be recovered.

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