Main > Chinese Optics Letters >  Volume 13 >  Issue 1 >  Page 012701 > Article
  • Abstract
  • Abstract
  • Figures (0)
  • Tables (0)
  • Equations (0)
  • References (21)
  • Cited By (3/1)
  • Get PDF
  • View Full Text
  • Paper Information
  • Received: Jul. 5, 2014

    Accepted: Oct. 24, 2014

    Posted: Jan. 6, 2015

    Published Online: Jan. 6, 2015

    The Author Email:

    DOI: 10.3788/col201513.012701

  • Get Citation
  • Copy Citation Text

    Xiaotian Song, Hongwei Li, Chunmei Zhang, Dong Wang, Shuang Wang, Zhenqiang Yin, Wei Chen, Zhengfu Han. Analysis of Faraday–Michelson quantum key distribution system with unbalanced attenuation[J]. Chinese Optics Letters, 2015, 13(1): 012701

    Download Citation

  • !Citations Alert
  • Category
  • Quantum Optics
  • Share
Chinese Optics Letters, Vol. 13, Issue 1, 012701 (2015)

Analysis of Faraday–Michelson quantum key distribution system with unbalanced attenuation

Xiaotian Song, Hongwei Li, Chunmei Zhang, Dong Wang, Shuang Wang, Zhenqiang Yin, Wei Chen, and Zhengfu Han

Author Affiliations

  • Key Laboratory of Quantum Information, CAS, University of Science and Technology of China, Hefei 230026, China

Abstract

Quantum key distribution (QKD) is a major research topic because it provides unconditional security. Unfortunately, many imperfections remain in QKD's experimental realization. The Faraday–Michelson (FM) QKD system is proposed to eliminate these imperfections using polarization. However, the long arm's phase modulator (PM) has an unexpected insertion loss, meaning that the state sent is no longer perfect. In this letter, we propose an alternative FM-QKD system structure, and analyze the security and key generation rate in comparison with the original system via diffeerent analysis methods. We find an obvious key rate improvement when the PM insertion loss is not extremely small.

keywords

Please Enter Your Email: