He-Fei Cao College of Physics, HebeiNormal University, Shijiazhuang, China College of Physics, Shijiazhuang College, Shijiazhuang, China
We present two different efficient quantum key distribution schemes over two different collective-noise channels. One is the phase noise, and the other is rotating noise. For the phase noise, we proposed a scheme of using GHZ state. Through the channel of the phase noise, the phase factor eiφ can be put forward as a whole phase, with the purpose of resistance to phase noise. For the rotating noise, we proposed a scheme of using Bell state, when the noise through the rotating channel, the impact of the noise can be effectively against.
quantum key distribution; collective-dephasing noise; collective-rotation noise
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