Fast and simple qubit-based synchronization for quantum key distribution

Abstract

We propose Qubit4Sync, a synchronization method for Quantum Key Distribution (QKD) setups, based on the same qubits exchanged during the protocol and without requiring additional hardware other than the one necessary to prepare and measure the quantum states. Our approach introduces a new cross-correlation algorithm achieving the lowest computational complexity, to our knowledge, for high channel losses. We tested the robustness of our scheme in a real QKD implementation.

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Cited by in corpus (28)

• Advances in Space Quantum Communications
• A scalable network for simultaneous pairwise quantum key distribution via entanglement-based time-bin coding
• Resource-effective Quantum Key Distribution: a field-trial in Padua city center
• Topological synchronization of quantum van der Pol oscillators
• A cost-efficient quantum access network with qubit-based synchronization
• Simple Quantum Key Distribution using a Stable Transmitter-Receiver Scheme
• Versatile and concurrent FPGA-based architecture for practical quantum communication systems
• Cross-encoded quantum key distribution exploiting time-bin and polarization states with qubit-based synchronization
• Nonclassical Attack on a Quantum KeyDistribution System
• Synchronization of quantum communication over an optical classical communication channel
• Intermodal quantum key distribution field trial with active switching between fiber and free-space channels
• Quantum Effects on the Synchronization Dynamics of the Kuramoto Model
• International time transfer between precise timing facilities secured with a quantum key distribution network
• Hybrid encoder for discrete and continuous variable QKD
• Wavelength- and time-division multiplexing via pump current variation of a pulsed semiconductor laser -- a method of synchronization for quantum key distribution
• Modular source for near-infrared quantum communication
• Energetic cost for speedy synchronization in non-Hermitian quantum dynamics
• Clock offset recovery with sublinear complexity enables synchronization on low-level hardware for quantum key distribution
• Low-error encoder for time-bin and decoy states for quantum key distribution
• A time-to-digital converter with steady calibration through single-photon detection
• In-Field Comparison between G.652 and G.655 Optical Fibers for Polarization-Based Quantum Key Distribution
• Time-bin encoded quantum key distribution over 120 km with a telecom quantum dot source
• Gigahertz-rate thin-film lithium niobate receiver for time-bin quantum communication
• Deployment-ready quantum key distribution over a classical network infrastructure in Padua
• Quantum Keyless Private Communication under intense background noise
• Quantum Physics in Space
• Countermeasures for Trojan-Horse Attacks on self-compensating all-fiber polarization modulator
• Qubit-based clock synchronization for QKD systems using a Bayesian approach