Autocompensating measurement-device-independent quantum cryptography in space division multiplexing optical fibers

Journal of the European Optical Society-Rapid Publications

D. Balado¹  G. M. Carral¹  J. Liñares¹  X. Prieto-Blanco¹ 

[1] Quantum Materials and Photonics Research Group, Optics Area, Applied Physics Department, Universidade de Santiago de Compostela, Campus Vida s/n, E-15782, Santiago de Compostela, Galicia, Spain;

关键词: Quantum cryptography;    Measurement-device-independent;    Space division multiplexing;    Autocompensation;    Integrated quantum optics;   

DOI  :  10.1186/s41476-021-00166-7

来源: Springer

【 摘 要 】

Single photon or biphoton states propagating in optical fibers or in free space are affected by random perturbations and imperfections that disturb the information encoded in such states and accordingly quantum key distribution is prevented. We propose three different systems for autocompensating such random perturbations and imperfections when a measurement-device-independent protocol is used. These systems correspond to different optical fibers intended for space division multiplexing and supporting collinear modes, polarization modes or codirectional modes such as few-mode optical fibers and multicore optical fibers. Accordingly, we propose different Bell-states measurement devices located at Charlie system and present simulations that confirm the importance of autocompensation. Moreover, these types of optical fibers allow the use of several transmission channels, which compensates the reduction of the bit rate due to losses.

【 授权许可】

CC BY