Dynamic polarization control for free-space continuous-variable quantum key distribution
Shiyu Wang, Peng Huang, Tao Wang, Guihua Zeng
Abstract
Free-space quantum key distribution (QKD) is attractive for the establishment of future global-scale quantum networks. However, it can be quite difficult for dynamic polarization control required in continuous-variable QKD systems to work properly in the presence of channel fading. Here we propose a dynamic polarization control scheme and verify its validity via simulations and an experiment performed over a 150 m free-space channel. The results indicate the capability of the scheme to effectively control the states of polarization for free-space continuous-variable quantum communication.
Topics & Concepts
Quantum key distributionPolarization (electrochemistry)Free spaceContinuous variableQuantum channelComputer scienceQuantum cryptographyQuantum networkQuantumFree-space optical communicationPhysicsOpticsElectronic engineeringQuantum computerQuantum mechanicsQuantum informationOptical communicationMathematicsMathematical optimizationEngineeringPhysical chemistryChemistryQuantum Information and CryptographyQuantum Mechanics and ApplicationsQuantum Computing Algorithms and Architecture