RT Journal Article
T1 Bell-state-exchange-parity-based protocol for efficient autocompensation of quantum key distribution encoded in polarization or spatial modes
A1 Carral López, Gabriel María
A1 Liñares Beiras, Jesús
A1 Mateo, Eduardo F.
A1 Prieto Blanco, Xesús
K1 Quantum key distribution
K1 Optical fibers
K1 Autocompensation
K1 Space-division multiplexing
K1 Photonic integrated circuits
AB 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.
PB MDPI
YR 2023
FD 2023-12-01
LK https://hdl.handle.net/10347/44049
UL https://hdl.handle.net/10347/44049
LA eng
NO Carral, G.M.; Liñares, J.; Mateo, E.F.; Prieto-Blanco, X. Bell-State-Exchange-Parity-Based Protocol for Efficient Autocompensation of Quantum Key Distribution Encoded in Polarization or Spatial Modes. Appl. Sci. 2023, 13, 12907. https://doi.org/10.3390/app132312907
NO We acknowledge financial support by the Galician Regional Government through a predoctoral grant (G.M.C-2020), co-financed by the European Social Fund
DS Minerva
RD 28 abr 2026