Improving the maximum transmission distance of continuous-variable quantum key distribution using a noiseless amplifier
arXiv:1205.0959 · doi:10.1103/PhysRevA.86.012327
Abstract
We show that the maximum transmission distance of continuous-variable quantum key distribution in presence of a Gaussian noisy lossy channel can be arbitrarily increased using a linear noiseless amplifier. We explicitly consider a protocol using amplitude and phase modulated coherent states with reverse reconciliation. We find that a noiseless amplifier with amplitude gain g can increase the maximum admissible losses by a factor 1/g^2.
8 pages, 6 figures
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- Heralded noiseless amplification and attenuation of non-gaussian states of light
- Noiseless Linear Amplifiers in Entanglement-Based Continuous-Variable Quantum Key Distribution
- Noiseless Linear Amplification and Quantum Channels
- Theoretical Analysis of an Ideal Noiseless Linear Amplifier for Einstein-Podolsky-Rosen Entanglement Distillation