Using fewer qubits to correct errors in the three-stage QKD protocol

Abhishek Parakh

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Scopus citations


This paper discusses correcting small rotation errors in the three-stage quantum key distribution (QKD) protocol using only two logical qubits thereby increasing communication efficiency. Further, we can correct errors before they accumulate at every stage ensuring that the errors remain small. Three-stage QKD is tolerant of multi-photon pulses for key exchange and therefore more applicable in real world scenarios. However, given that it requires back and forth communication, any channel errors that occur accumulate. We discuss the proposed error correction protocol in detail and workout each step. We show how the two transacting parties can correct small rotation errors using just two logical qubits in a majority of cases. We compute the efficiency increase and bound on the magnitude of rotation errors that can be tolerated.

Original languageEnglish (US)
Title of host publicationQuantum Information Science and Technology IV
EditorsMark T. Gruneisen, Miloslav Dusek, John G. Rarity
ISBN (Electronic)9781510621893
StatePublished - 2018
EventQuantum Information Science and Technology IV 2018 - Berlin, Germany
Duration: Sep 10 2018Sep 12 2018

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


ConferenceQuantum Information Science and Technology IV 2018


  • Quantum error correction
  • Three stage quantum key distribution

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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