Quantum Signal Transmission

Lei Wang, Jie‐Hui Huang, Jonathan P. Dowling +1 more

Min Nie

To research the problem of transmission fidelity of multiuser quantum signaling under noisy background,the definition and transmission method of signaling fidelity were presented.The relationship between entanglement degree and signaling successful transmission ratio was analyzed.The computing model of quantum entanglement signaling was put forward,and the simulation for signaling transmission fidelity was achieved finally.The results show that the interference of environment noise to quantum signaling channel entanglement degree restricts the distance and efficiency of the signaling transmission.And the signaling fidelity is convergence gradually with the increase of the sample's number.To insure entanglement signaling transmission precision,the sample's number should be adjusted properly according to the communication distance.

李超 LI Chao, 聂敏 Nie Min, 刘晓慧 LIU Xiao-hui

A quantum signaling transmission system of multi-user is presented,and the transmission process signaling channel is introduced.The damage model maliciously attacked by the third party is analyzed in the transmission process,and the idea of decoy state is introduced to the safety of quantum signaling in direct communication.To overcome photon number splitting(PNS) attack,light pulses are sent using different light intensities,which also improve the safety of the signal transmission.The simulation result shows that repair strategy of multi-user quantum signaling transmission system being attacked can effective detect the PNS attack,and increase distance of security transmission,to ensure the signaling transmission process safely and effectively.

连涛 LIAN Tao, 聂敏 Nie Min

Aiming at the quantum signalling repeater network model for multi-user,environment quantum noises effect on remote transmission of signalling was studied.A kind of quantum signaling repeater strategy was purposed after the theory of quantum swapping being analyzed.Then a bus network model was put forward and the success rate of long distance quantum signaling transmission was simulated.The results show that long distance signaling transmission has a close relationship with the noise power spectral density,transmission distance and repeater times.When noise power spectral density is constant and there is no repeater during the transmission process,the success rate declines like plesio-flat-parabola with increasing of the transmission distance.On the condition of constant noise power spectral density and constant transmission distance,the success rate increases obviously while the repeater times is increasing.Therefore,on the behalf of reliable quantum signaling transmission the transmission distance and repeater times should be designed properly under the circumstance of constant background noise.

IntroBooks