Coherent detection schemes for subcarrier wave continuous variable quantum key distribution
E.O. Samsonov, R. Goncharov, M.A. Fadeev, Alexander Zinoviev, Danylo Kirichenko, Boris Nasedkin, Alexei D. Kiselev, V. I. Egorov
Abstract
We examine different methods to implement coherent detection in subcarrier wave quantum key distribution (SCW QKD) systems. For classical wave fields, we present the models describing homodyne-type and heterodyne-type coherent detection schemes needed to extract information from the quadrature phase-coded multimode signals used in SCW QKD. Practical feasibility of the proposed schemes is corroborated by experiments.
Topics & Concepts
Quantum key distributionSubcarrierHeterodyne detectionHomodyne detectionCoherent statesComputer scienceKey (lock)Electronic engineeringContinuous variableQuantumDirect-conversion receiverMulti-mode optical fiberPhysicsOpticsTelecommunicationsQuantum mechanicsOptical fiberMathematicsEngineeringMathematical optimizationComputer securityLaserChannel (broadcasting)Orthogonal frequency-division multiplexingQuantum Information and CryptographyOptical Network TechnologiesQuantum optics and atomic interactions