A low cost, short range quantum key distribution system

David L D Lowndes, Stefan Frick, Andy S Hart, John G Rarity

Research output: Contribution to journalArticle (Academic Journal)peer-review

15 Citations (Scopus)


We present a miniaturized quantum key distribution system, designed to augment the more mature quantum key distribution systems currently commercially available. Our device is designed for the consumer market, and so size, weight and power are more important than raw performance. To achieve our form factor, the transmitter is handheld and the receiver is a larger fixed terminal. We envisage users would bring their transmitters to centrally located receivers and exchange keys which they could use at a later point. Transmitting qubits at 80 MHz, the peak key rate is in excess of 20 kbps. The transmitter device fits within an envelope of <150 ml, weighs 65 g and consumes 3.15 W of power.
Original languageEnglish
Article number15
JournalEPJ Quantum Technology
Issue number1
Publication statusPublished - 26 May 2021

Bibliographical note

Funding Information:
The research leading to this work has been supported by the Quantum Communications Hub funded by the EPSRC grant ref. EP/M013472/1 and EP/T001011/1.

Publisher Copyright:
© 2021, The Author(s).

Structured keywords

  • QETLabs
  • Photonics and Quantum


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