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Improving the maximum transmission distance of continuous-variable quantum key distribution using a noiseless amplifier

Abstract:

We show that the maximum transmission distance of continuous-variable quantum key distribution in presence of a Gaussian noisy lossy channel can be arbitrarily increased using a heralded noiseless linear amplifier. We explicitly consider a protocol using amplitude- and phase-modulated coherent states with reverse reconciliation. Assuming that the secret key rate drops to zero for a line transmittance T lim, we find that a noiseless amplifier with amplitude gain g can ...

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Publisher copy:
10.1103/PhysRevA.86.012327

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Institution:
University of Oxford
Department:
Oxford, MPLS, Physics, Atomic and Laser Physics
Role:
Author
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Journal:
Physical Review A - Atomic, Molecular, and Optical Physics
Volume:
86
Issue:
1
Publication date:
2012-07-23
DOI:
EISSN:
1094-1622
ISSN:
1050-2947
URN:
uuid:48187f59-24bc-4ed7-9138-2e2bc37c50da
Source identifiers:
345103
Local pid:
pubs:345103
Language:
English

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