Author: Peter Horak

Source: Journal of Modern Optics, Volume 51, Number 8, May 20, 2004 , pp. 1249-1264(16)

Publisher: Taylor and Francis Ltd

Abstract:

The role of squeezing in quantum key distribution with continuous variables based on homodyne detection and post-selection is investigated for several specific eavesdropping attacks. It is shown that amplitude squeezing creates strong correlations between the signals of the legitimate receiver and a potential eavesdropper. Post-selection of the received pulses can therefore be used to reduce the eavesdropper's knowledge of the raw key, which increases the secret key rate by orders of magnitude over large distances even for modest amounts of squeezing.

Document Type: Research article

DOI: http://dx.doi.org/10.1080/09500340410001648474

Affiliations: 1: Optoelectronics Research Centre University of Southampton Southampton SO17 1BJ UK

Publication date: 2004-05-01

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