We calculate the magnitude of cross phase modulation(XPM)induced by classical channels,and analyze its impact on quantum secure key rate.The results show that the XPM induced by classical signals is small and its impa...We calculate the magnitude of cross phase modulation(XPM)induced by classical channels,and analyze its impact on quantum secure key rate.The results show that the XPM induced by classical signals is small and its impact on the quantum key distribution can be neglected.展开更多
We experimentally demonstrate a kind of high-quantum correlated,practical quantum random generation based on the quantum phase noise of a laser,which uniformly distributes in the range of(-π,π]by driving the laser w...We experimentally demonstrate a kind of high-quantum correlated,practical quantum random generation based on the quantum phase noise of a laser,which uniformly distributes in the range of(-π,π]by driving the laser with a stream of narrow electrical pulses.We propose a working mode to further suppress the impact of phase drift after we use the passive measures(thermal and mechanical isolation)to slow it down.Moreover,a new method which ensures random numbers to be true representations of quantum characteristics is presented to quantify the quantum randomness.This scheme has an inherent advantage for multiplex generation.展开更多
基金Supported by the National Natural Science Foundation of China under Grant No 10904174the Natural Science Foundation of Hunan Province under Grant No 11JJ2004.
文摘We calculate the magnitude of cross phase modulation(XPM)induced by classical channels,and analyze its impact on quantum secure key rate.The results show that the XPM induced by classical signals is small and its impact on the quantum key distribution can be neglected.
基金Supported by the National Natural Science Foundation of China under Grant Nos 61072071 and 11204377the Program for New Century Excellent Talents.
文摘We experimentally demonstrate a kind of high-quantum correlated,practical quantum random generation based on the quantum phase noise of a laser,which uniformly distributes in the range of(-π,π]by driving the laser with a stream of narrow electrical pulses.We propose a working mode to further suppress the impact of phase drift after we use the passive measures(thermal and mechanical isolation)to slow it down.Moreover,a new method which ensures random numbers to be true representations of quantum characteristics is presented to quantify the quantum randomness.This scheme has an inherent advantage for multiplex generation.
