Multi-photon free-space quantum key distribution system with synchronously delayed classical signals

Li Yang; Lei Hu; Songhou Liu

doi:10.1117/12.668187

20 January 2006 Multi-photon free-space quantum key distribution system with synchronously delayed classical signals

Li Yang, Lei Hu, Songhou Liu

Proceedings Volume 6027, ICO20: Optical Information Processing; 60271W (2006) https://doi.org/10.1117/12.668187
Event: ICO20:Optical Devices and Instruments, 2005, Changchun, China

Abstract

We present a multi-photon scheme to improve the efficiency of free-space quantum key distribution system. Two essential features of free-space quantum key distribution system are its classical timing pulses and frequency tracking devices, we make use of these two features to design a new type of quantum key distribution system with multi-photon quantum signals and synchronously delayed classical signals. This scheme is much more efficient then the usual one, and in the same time, more secure since its synchronously randomizing of frequency and arriving time of quantum signals makes Eves have almost no opportunity to catch the quantum signals in time.

Citation Download Citation

Li Yang, Lei Hu, and Songhou Liu "Multi-photon free-space quantum key distribution system with synchronously delayed classical signals", Proc. SPIE 6027, ICO20: Optical Information Processing, 60271W (20 January 2006); https://doi.org/10.1117/12.668187

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