Plug-and-play measurement-device-independent quantum key distribution

Yujun Choi, Osung Kwon, Minki Woo, Kyunghwan Oh, Sang-Wook Han, Yong-Su Kim, and Sung Moon
Phys. Rev. A 93, 032319 – Published 14 March 2016

Abstract

Quantum key distribution (QKD) guarantees unconditional communication security based on the laws of quantum physics. However, practical QKD suffers from a number of quantum hackings due to the device imperfections. From the security standpoint, measurement-device-independent quantum key distribution (MDI-QKD) is in the limelight since it eliminates all the possible loopholes in detection. Due to active control units for mode matching between the photons from remote parties, however, the implementation of MDI-QKD is highly impractical. In this paper, we propose a method to resolve the mode matching problem while minimizing the use of active control units. By introducing the plug-and-play (P&P) concept into MDI-QKD, the indistinguishability in spectral and polarization modes between photons can naturally be guaranteed. We show the feasibility of P&P MDI-QKD with a proof-of-principle experiment.

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  • Received 21 October 2015

DOI:https://doi.org/10.1103/PhysRevA.93.032319

©2016 American Physical Society

Physics Subject Headings (PhySH)

  1. Research Areas
  1. Properties
Quantum Information, Science & Technology

Authors & Affiliations

Yujun Choi1,2,*, Osung Kwon1, Minki Woo1,3, Kyunghwan Oh2, Sang-Wook Han1, Yong-Su Kim1,4,†, and Sung Moon1

  • 1Center for Quantum Information, Korea Institute of Science and Technology (KIST), Seoul, 02792, Republic of Korea
  • 2Department of Physics, Yonsei University, Seoul, 03722, Republic of Korea
  • 3Graduate School of IT Convergence, Ajou University, Suwon, 16499, Republic of Korea
  • 4Department of Nano-Materials Science and Engineering, Korea University of Science and Technology, Daejeon 34113, Republic of Korea

  • *cyj5595@gmail.com
  • yong-su.kim@kist.re.kr

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Issue

Vol. 93, Iss. 3 — March 2016

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