Bell-State-Exchange-Parity-Based Protocol for Efficient Autocompensation of Quantum Key Distribution Encoded in Polarization or Spatial Modes
Source abstract
Abstract
We analyze autocompensation possibilities in entanglement-based QKD protocols. In particular, we study the seminal BBM92 protocol and find that an autocompensating technique is possible, although with severe limitations. This prompts the introduction of a different, more practical protocol based on Bell state exchange parity (BSEP), which allows for intrinsic autocompensation of optical fiber perturbations in various two-dimensional fiber-optic encodings while retaining advantageous MDI-QKD characteristics. We present the BSEP protocol in detail, describing both the quantum light propagation and the optical hardware requirements. Finally, we analyze its security, computing its expected performance through the key rate.
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Research context
OpenAlex topics: Quantum Information and Cryptography · Quantum Computing Algorithms and Architecture · Quantum Mechanics and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Optics Area, Department of Applied Physics and iMATUS, Faculty of Physics/Faculty of Optics and Optometry, University of Santiago de Compostela, 15782 Santiago de Compostela, Galicia, Spain
Submarine Network Division, NEC Corporation, Tokyo 108-8001, Japan
Funding
European Union Next Generation EU
References (49)
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