Digital synchronization for continuous-variable quantum key distribution
- URL: http://arxiv.org/abs/2203.08486v2
- Date: Thu, 17 Mar 2022 13:17:03 GMT
- Title: Digital synchronization for continuous-variable quantum key distribution
- Authors: Hou-Man Chin, Nitin Jain, Ulrik L. Andersen and Tobias Gehring
- Abstract summary: Continuous variable quantum key distribution (CV-QKD) is a promising emerging technology for the distribution of secure keys for symmetric encryption.
We propose a digital synchronization procedure for a modern CV-QKD system.
We experimentally investigate its performance with a Gaussian modulated CV-QKD system operating over a 10-20 km span of standard single mode fibre.
- Score: 0.7646713951724012
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: Continuous variable quantum key distribution (CV-QKD) is a promising emerging
technology for the distribution of secure keys for symmetric encryption. It can
be readily implemented using commercial off-the-shelf optical
telecommunications components. A key requirement of the CV-QKD receiver is the
ability to measure the quantum states at the correct time instance and rate
using the correct orthogonal observables, referred to as synchronization. We
propose a digital synchronization procedure for a modern CV-QKD system with
locally generated local oscillator for coherent reception. Our proposed method
is modulation format independent allowing it to be used in a variety of CV-QKD
systems. We experimentally investigate its performance with a Gaussian
modulated CV-QKD system operating over a 10-20 km span of standard single mode
fibre. Since the procedure does not require hardware modifications it paves the
way for cost-effective QKD solutions that can adapt rapidly to changing
environmental conditions.
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