Correlation of Polarization Distortions in Multi-Core Fiber Under External Influence

The results of the study on the correlation of polarization distortions in a multi-core fiber (MCF) under external influences are presented. The influence of mechanical effects and the effect of a magnetic field on the cores of the MCF are investigated. A high correlation of polarization distortions in different cores of a multi-core fiber under physical influence is observed. These results are useful for developing methods to mitigate distortions in the polarization states of single photons in wire quantum channels for quantum key distribution systems.