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    • 8. 发明专利
    • DE60220083T2
    • 2008-01-10
    • DE60220083
    • 2002-09-26
    • MITSUBISHI ELECTRIC CORP
    • NISHIOKA TSUYOSHIISHIZUKA HIROKAZUHASEGAWA TOSHIO
    • H04L9/12H03M13/01H04B10/30H04L9/08
    • A qubit generating unit 40 generates a qubit having a predetermined quantum state. A qubit encoding unit 70 performs quantum encoding of the generated qubit. A first pseudo-random number generating unit 60 generates a first pseudo-random number from secretly shared information 3 which has been secretly shared with the quantum receiving device 200 in advance. A quantum modulator 80 performs quantum modulation of the qubit on which quantum encoding has been performed based on the first pseudo-random number and sends the modulated qubit to the quantum receiving device 200. A second pseudo-random number generating unit 220 generates a second pseudo-random number from secretly shared information 21 which has been secretly shared with the above quantum sending device 100 in advance synchronously with generation of the above first pseudo-random number. A qubit demodulator 230 performs quantum demodulation of the qubit which has been received from the quantum demodulator 80 based on the second pseudo-random number.
    • 10. 发明公开
    • PHOTON DETECTING APPARATUS AND OPTICAL COMMUNICATION SYSTEM
    • PHOTONENDETEKTIONSVORRICHTUNG UND OPTISCHUN KOMMUNIKATIONSSYSTEM
    • EP1783931A4
    • 2007-11-28
    • EP04747396
    • 2004-07-12
    • MITSUBISHI ELECTRIC CORP
    • ABE JUN ICHISHIMIZU KATSUHIROHASEGAWA TOSHIONISHIOKA TSUYOSHIISHIZUKA HIROKAZU
    • H04B10/516H04B10/524H04B10/61H04B10/70H04J14/00H04J14/02H04J14/08H04L9/08H04L9/12
    • H04L9/0852G01J11/00H04B10/70H04J14/02
    • A photon detecting apparatus for use in a quantum encryption receiver apparatus or the like, wherein a plurality of photon detectors are used to improve the response speed of the photon detecting apparatus. There are included wavelength branching means (12) for branching a wavelength-multiplexed incident photon pulse sequence for each of wavelengths; a plurality of photon detectors (13-1, ···, 13-n) for detecting the photons as branched by the wavelength branching means (12); bias applying means (14) for applying gate pulses, as bias voltages, to the respective ones of the plurality of photon detectors (13-1, ···, 13-n) in conformity with the timings at which the output lights of the wavelength branching means (12) are incident on the plurality of photon detectors (13-1, ···, 13-n); and data processing means (15) for converting the detection signals from the plurality of photon detectors (13-1, ···, 13-n) to time series signals.
    • 一种用于量子加密接收机装置等的光子检测装置,其中使用多个光子检测器来提高光子检测装置的响应速度。 包括波长分支装置(12),用于分支每个波长的波长复用入射光子脉冲序列; 多个光子检测器(13-1,...,13-n),用于检测由波长分支装置(12)分支的光子; 偏置施加装置(14),用于根据所述多个光子检测器(13-1,...,13-n)中的输出光的定时将栅极脉冲作为偏置电压施加到所述多个光子检测器 波长分支装置(12)入射到多个光子检测器(13-1,...,13-n)上。 和数据处理装置(15),用于将来自多个光子检测器(13-1,...,13-n)的检测信号转换成时间序列信号。