Probabilistic shaped 128-APSK CV-QKD transmission system over optical fibres
Daniel Pereira, Margarida Almeida, M. Facão, Armando N. Pinto, Nuno A. Silva
Abstract
In this Letter we present a discrete modulated, continuous variables quantum key distribution implementation using two probabilistically shaped, 128-symbol, amplitude and phase shift keying constellations. At Bob's detection side, a polarization diverse, true heterodyne receiver architecture is implemented for symbol recovery. We demonstrate experimentally that our system is capable of achieving security against collective attacks, while using accessible, telecom-grade material, and of functioning for an indefinitely long period of time at distances in excess of 185 km, in the asymptotic regime.
Topics & Concepts
Quantum key distributionAmplitude and phase-shift keyingOpticsHeterodyne detectionProbabilistic logicComputer scienceKeyingQuantum cryptographyQuadrature amplitude modulationOptical communicationPhysicsPhase-shift keyingConstellationTelecommunicationsElectronic engineeringBit error rateQuantumChannel (broadcasting)Quantum mechanicsEngineeringQuantum informationLaserArtificial intelligencePhotonAstronomyQuantum Information and CryptographyOptical Network TechnologiesQuantum Computing Algorithms and Architecture