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Trapped Ion Quantum Computing

Long-distance continuous-variable quantum key distribution with efficient channel estimation

arXiv
Authors: László Ruppert, Vladyslav C. Usenko, Radim Filip

Year

2014

Paper ID

46012

Status

Preprint

Abstract Read

~2 min

Abstract Words

100

Citations

N/A

Abstract

We investigate the main limitations which prevent the continuous-variable quantum key distribution protocols from achieving long distances in the finite-size setting. We propose a double-modulation protocol which allows using each state for both channel estimation and key distribution. As opposed to the standard method, we optimize the parameters of the protocol and consider squeezed as well as coherent states as a signal. By optimally combining the resources the key rate can approach the theoretical limit for long distances, and one can obtain about ten times higher key rate using ten times shorter block size than in the current state-of-the-art implementation.

Why This Paper Matters

  • This paper contributes to the Trapped-Ion Quantum Computing research area in the Quantum Articles archive.
  • It adds a 2014 reference point for readers tracking recent quantum research.
  • We investigate the main limitations which prevent the continuous-variable quantum key distribution protocols from achieving long distances in the finite-size setting.

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References & Citation Signals

[1] DOI https://doi.org/arXiv:1412.2910 [2] arXiv https://arxiv.org/abs/1412.2910 [3] Publisher https://arxiv.org/abs/1412.2910

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