Improve the Maximum Transmission Distance of Four-State Continuous
Variable Quantum Key Distribution by using a Noiseless Linear Amplifier [PDF]
Bingjie Xu, Chunming Tang, Hui Chen, Wenzheng Zhang, Fuchen ZhuA modified four-state CVQKD protocol is proposed to increase the maximum transmission distance and tolerable excess noise in the presence of Gaussian lossy and noisy channel by using a noiseless linear amplifier (NLA). A NLA with amplitude gain g can increase the maximum admission losses by 20log(g) dB.View original: http://arxiv.org/abs/1210.0107
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