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Journal of Xi'an University of Post and Telecommunications

Transmission fidelity analysis of multiuser quantum signaling under noisy background

Min Nie

Published Jan 1, 2012• 0 citations
OpenAlex

Abstract

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.

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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.
Signaling is an essential and important component in quantum communication. However, the current research on the quantum signaling transmission computing model has not yet commenced. In this paper, based on the background of noise, the transmission damage probability model of quantum signaling is presented. The relationship between the fidelity of signaling and the samples sent is studied. The simulation results show that, when the state of quantum entanglement is the maximum state of entanglement, the fidelity is 1. The fidelity is increased with the number of samples and limited to 1. For the signaling standards of the future quantum communication system, this study has good technical support role.
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.
Quantum signaling states have decoherence because of the environment during the transmission. It causes signaling damage and thus will have impact on building high survivability quantum entanglement signaling network. In order to study the influence deeply, Poisson damage model of quantum signaling network is established. First, disaster magnitude is defined base on signaling fidelity. Second, average damage signaling quantum bits and survival function of quantum signaling network is put forward by basic quantum theory. At last, research on the signaling damage repair strategy and simulation is analyzed. Simulation results show that increasing of disaster magnitude will greatly reduce the signaling network survivability. However, increasing the nodes and controlling signaling damage caps may improve survivability. The repair strategy which costs small number of cycles can rapidly increase the signaling fidelity from 0.6 to 0.9 and the survival function of the signaling network from 0.4 to 0.9.
Aim To design multiuser quantum signaling network for the purpose of interworking with traditional communication network.Methods A multiuser quantum signaling network with multi-stages hierarchy level network topology is proposed and a quantum signaling system is introduced.Multi-classes quantum signaling transmission is based on quantum teleportation and entanglement swapping.Results SBER(Signaling Bit Error Rate) decreases with higher quantum channel coefficient or lower base angle offset,the transmission damage is mainly due to the quantum noise in the condition of base angle offset is below 6 degree,the relay mechanism can achieve higher reliability by decreasing SBER(Signaling Bit Error Rate).Conclusion The network has plain structure,high expandability,robust reliability.The mechanism of return route and relay can reduce the interference of quantum channel.
Quantum entanglement swapping can be used to establish reliable quantum remote transmission channel so as to realize transmission of quantum states. However, the highly stable quantum network is required in the quantum channels when using quantum entanglement swapping, otherwise it will waste a lot of entanglement resources. In order to save entanglement resources, we have to put forward a kind of quantum communication network transmission protocol based on packet switching, according to the theory of quantum teleportation. Firstly, the principle of packet switching in computer network is introduced. Next we describe the implementation process of quantum network transmission protocols which are based on entanglement swapping and packet switching. We then analyze the reliability, security and utilization rate of entanglement of the protocol we have proposed. And after that the quantitative relationship about the number of entanglement quantum states, the number of routers and link error rates are calculated. Finally, we compare these two transmission protocols. Simulation results show that the number of entanglement for these two protocols is equal without consideration of the link errors. When taking them into account, the packet switching transmission protocol can save numbers of entanglement resources obviously. In addition, with the increase of number of routers and the rise in link error rates, the quantum communication network transmission protocol based on packet switching will need less entanglement resources than that based on entanglement swapping. Therefore, when the quantum transmission network is not stable, the packet switching transmission protocol has a better transmission performance, and it can be applied to the future construction of quantum network.
A quantum signaling transmission scheme based on quantum entanglement,local unitary operation and teleportation is proposed for signaling transmission in a multiuser quantum signaling network with multi-stage hierarchy level network topology.The analytical result shows that the scheme is secure in case of eavesdropping attack including intercept-measure-resend attacks,intercept-replace and adding-ancilla attacks.Consequently,the probability model of quantum signaling transmission damage probability and the repair strategy of the damage of quantum signaling are presented,and the probability model in noise background and non-ideal traditional channel has very low complexity.