• DocumentCode
    126101
  • Title

    Improving the maximum transmission distance of continuous variable quantum key distribution by using a noiseless linear amplifier

  • Author

    Bingjie Xu ; Bing Zeng

  • Author_Institution
    Sci. & Technol. on Commun. Security Lab., Chengdu, China
  • fYear
    2014
  • fDate
    16-23 Aug. 2014
  • Firstpage
    1
  • Lastpage
    4
  • Abstract
    Developing quantum key distribution (QKD) protocols resistant to losses and noises is of great importance in practice. We show that the maximum transmission distance and tolerable excess noise of the Gaussian modulation (GM) and discrete modulation (DM) CVQKD protocols can be dramatically increased by using a noiseless linear amplifier (NLA). It is proved that a NLA with gain g can increase the maximum transmission distance by 20 /αlog10 g km, where a = 0.2 dB/km is the loss coefficient of the fiber channel.
  • Keywords
    cryptographic protocols; modulation; Gaussian modulation; NLA; continuous variable quantum key distribution; discrete modulation CVQKD protocols; maximum transmission distance; noiseless linear amplifier; quantum key distribution protocols; tolerable excess noise; Gain; Modulation; Monte Carlo methods; Noise; Optimized production technology; Protocols; Security;
  • fLanguage
    English
  • Publisher
    ieee
  • Conference_Titel
    General Assembly and Scientific Symposium (URSI GASS), 2014 XXXIth URSI
  • Conference_Location
    Beijing
  • Type

    conf

  • DOI
    10.1109/URSIGASS.2014.6929466
  • Filename
    6929466
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=126101