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Analysis of polarization state in quantum key distribution via single-photon two-qubit states |
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| Authors: | Gu-hao Zhao Shang-hong Zhao Zhou-shi Yao Chen-Lu Hao Wen Meng Xiang Wang Zhi-hang Zhu Feng Liu |
| Affiliation: | 1. School of Information and Navigation, Air Force Engineering University, Xian 710077, Shaanxi, China;2. Xi’an Branch of China Academy of Space Technology, Xian 710000, Shaanxi, China;3. School of Air and Missile Defense, Air Force Engineering University, Xian 710077, Shaanxi, China |
| Abstract: | An improved quantum key distribution scheme via single-photon two-qubit states is proposed. The input–output model of the polarization state is established. And the influence of the interferometers to the polarization state is analyzed. Quantum bit error rate of polarization coding caused by birefringent and coordinate system difference between incident light and the fast and slow axes in fiber interferometer is simulated. Furthermore, maintaining conditions of polarization state are given on this basis. |
| Keywords: | 03.67.Dd 84.40.Ua 77.22.Ej |
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