Long-distance continuous-variable quantum key distribution over 100-km fiber with local local oscillator
Technical University of Denmark · Palacký University Olomouc
Abstract
Quantum key distribution (QKD) enables two remote parties to share encryption keys with security based on the laws of physics. Continuous-variable (CV) QKD with coherent states and coherent detection integrates well with existing telecommunication networks. Thus far, long-distance CV-QKD has only been demonstrated using a highly complex scheme where the local oscillator is transmitted, opening security loopholes for eavesdroppers and limiting potential applications. Here, we report a long-distance CV-QKD experiment with a locally generated local oscillator over a 100-kilometer fiber channel with a total loss of 15.4 decibels. This record-breaking distance is achieved by controlling the phase noise-induced…
Citation impact
- FWCI
- 33.58
- Percentile
- 100%
- References
- 50
Authors
6Topics & keywords
- Quantum key distribution
- Continuous variable
- Local oscillator
- Variable (mathematics)
- Key (lock)
- Statistical physics
- Quantum
- Distribution (mathematics)