Research on Entanglement Degradation Model in Quantum Communication of Power System

Entangled states are the core resources and the information carriers in private quantum communication technology. How to guarantee the entanglement of two-photon states is one of the main problems in quantum private communication. This paper studies the model of quantum entanglement degradation caused by ambient noise in quantum private communication technology based on single mode optical fibers, especially the noise of overhead power optical cables in the harsh environment. The transverse and longitudinal decoherence effects of quantum entanglement induced by ambient noise are discussed respectively from the anisotropy of refractive index and absorption coefficient. The research results will provide a reference for the application of entanglement-based quantum private communication in power system and other harsh electromagnetic environment.