Noiseless Linear Amplifiers in Entanglement-Based Continuous-Variable Quantum Key Distribution

Research output: Contribution to journalArticle

Published copy (DOI)


  • Yi-Chen Zhang
  • Zhengyu Li
  • Christian Weedbrook
  • Kevin Marshall
  • Stefano Pirandola
  • Song Yu
  • Hong Guo


Publication details

DatePublished - 1 Jul 2015
Issue number7
Number of pages16
Pages (from-to)4547-4562
Original languageEnglish


We propose a method to improve the performance of two entanglement-based continuous-variable quantum key distribution protocols using noiseless linear amplifiers. The two entanglement-based schemes consist of an entanglement distribution protocol with an untrusted source and an entanglement swapping protocol with an untrusted relay. Simulation results show that the noiseless linear amplifiers can improve the performance of these two protocols, in terms of maximal transmission distances, when we consider small amounts of entanglement, as typical in realistic setups.

Bibliographical note

Special issue on Quantum Cryptography

    Research areas

  • quant-ph

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