Abstract
We evaluate the performance of Gaussian Modulated Coherent State (GMCS) Continuous-Variable Quantum Key Distribution (CV-QKD), in terms of secure key rate, at different detector bandwidths. We illustrate the advantages and limitations of high-speed CV-QKD systems using a general noise model in which we consider various noise sources and their dependence upon detection bandwidth. Experimentally, the feasibility of high speed CV-QKD is demonstrated by using a GHz bandwidth balanced homodyne detector (BHD) established with commercially available components. We provide secure key rates of transmitted and local local oscillator schemes under various clock rates.
Original language | English |
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Article number | 126034 |
Journal | Optics Communications |
Volume | 471 |
Early online date | 27 Apr 2020 |
DOIs | |
Publication status | Published - 15 Sept 2020 |
Keywords
- Balanced homodyne detector
- Continuous variable quantum key distribution
- Gaussian modulated coherent state protocol
- Quantum key distribution
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Physical and Theoretical Chemistry
- Electrical and Electronic Engineering