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- Title
Balancing continuous-variable quantum key distribution with source-tunable linear optics cloning machine.
- Authors
Guo, Ying; Lv, Geli; Zeng, Guihua
- Abstract
We show that the tolerable excess noise can be dynamically balanced in source preparation while inserting a tunable linear optics cloning machine (LOCM) for balancing the secret key rate and the maximal transmission distance of continuous-variable quantum key distribution (CVQKD). The intensities of source noise are sensitive to the tunable LOCM and can be stabilized to the suitable values to eliminate the impact of channel noise and defeat the potential attacks even in the case of the degenerated linear optics amplifier (LOA). The LOCM-additional noise can be elegantly employed by the reference partner of reconciliation to regulate the secret key rate and the transmission distance. Simulation results show that there is a considerable improvement in the secret key rate of the LOCM-based CVQKD while providing a tunable LOCM for source preparation with the specified parameters in suitable ranges.
- Subjects
QUANTUM theory; SIMULATION methods &; models; OPTICAL amplifiers; QUANTUM cryptography; QUANTUM communication (Optics)
- Publication
Quantum Information Processing, 2015, Vol 14, Issue 11, p4323
- ISSN
1570-0755
- Publication type
Article
- DOI
10.1007/s11128-015-1100-3