关键词: 量子光学, 奇相干光源, 量子密钥分配, 量子存储

Abstract: Aiming at the problem that the key generation rate is too low when the weak coherent light source used in the traditional quantum key distribution protocol, this paper optimizes the light source, uses odd coherent light source to replace the weak coherent light source, and proposes measurement-device-independent quantum key distribution protocol based on odd coherent light source and quantum storage. This paper compares the performance of measurement-device-independent quantum key distribution protocols based on odd coherent light source and quantum storage with the protocols based on weak coherent light source, also analyzes the relationship between the key generation rate, minimum decoherence time and the safe transmission distance in the quantum key distribution protocol based on odd coherent light source and quantum storage. The simulation results show that the photon number is greatly reduced by the introduction of odd coherent light source, which makes up the deficiency of the traditional light source. With the increase of safe transmission distance, the key generation rate decreases, but the performance based on odd coherent light source and quantum storage is still higher than that of the traditional one.

Key words: quantum optics, odd coherent light source, quantum key distribution, quantum storage