ACTA PHOTONICA SINICA

Differential Phase Encoding Scheme for the Polarization State of Quantum Signaling and Simulation

Xiaohui Liu

Published Jan 1, 2013• 0 citations

Abstract

In order to study the quantum communication signaling system and realize quantum communication between multiple users,a kind of differential phase encoding scheme for the polarization state of quantum signaling is proposed,and details of the encoding process are described.The sender uses polarization states of different photons to represent different signalings,and then implements phase modulation for the photons and encodes the quantum signaling based on the phase difference between the impulses before and affter encoding.In order to complete the decoding,two optical pulses occur interference at the beam splitter.The signal 0 or 1 can be detected by different detectors according to their phase difference.According to the Gaussian pulse distribution,quantitative relationship amongthe quantum bit error rate caused by the pulse delay to differential phase of encoding system,pulse width and delay time in photonic transmission process are enduced.Besides,quantum bit error rate of single-photon pulsesdistribution of Gaussian is calculated in determined timing jitter.Finally,quantum signaling encoded efficiency and bit error rate are analyzed and simulated.The results show that the encoded efficiency of proposed coding scheme can reach 75% that can satisfy the needs of quantum mobile communication.

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