Continuous-variable QKD over 50km commercial fiber
arXiv:1709.04618 · doi:10.1088/2058-9565/ab19d1
Abstract
The continuous-variable version of quantum key distribution (QKD) offers the advantages (over discrete-variable systems) of higher secret key rates in metropolitan areas as well as the use of standard telecom components that can operate at room temperature. An important step in the real-world adoption of continuous-variable QKD is the deployment of field tests over commercial fibers. Here we report two different field tests of a continuous-variable QKD system through commercial fiber networks in Xi'an and Guangzhou over distances of 30.02 km (12.48 dB) and 49.85 km (11.62 dB), respectively. We achieve secure key rates two orders-of-magnitude higher than previous field test demonstrations. This is achieved by developing a fully automatic control system to create stable excess noise and by applying a rate-adaptive reconciliation protocol to achieve a high reconciliation efficiency with high success probability. Our results pave the way to achieving continuous-variable QKD in a metropolitan setting.
arXiv comment19 pages, 6 figures
References in corpus (44)
- Quantum Cryptography
- The Security of Practical Quantum Key Distribution
- Gaussian Quantum Information
- Continuous variable quantum cryptography using coherent states
- Quantum key distribution using gaussian-modulated coherent states
- Fundamental Limits of Repeaterless Quantum Communications
- General Benchmarks for Quantum Repeaters
- Field test of quantum key distribution in the Tokyo QKD Network
- Distillation of secret key and entanglement from quantum states
- Experimental demonstration of long-distance continuous-variable quantum key distribution
- Practical challenges in quantum key distribution
- Quantum key distribution over 25 km with an all-fiber continuous-variable system
- Quantum Cryptography without Switching
- High-rate quantum cryptography in untrusted networks
- Finite-size analysis of continuous-variable quantum key distribution
- Composable security proof for continuous-variable quantum key distribution with coherent states
- Long term performance of the SwissQuantum quantum key distribution network in a field environment
- A de Finetti representation theorem for infinite dimensional quantum systems and applications to quantum cryptography
- Distributing Secret Keys with Quantum Continuous Variables: Principle, Security and Implementations
- Field and long-term demonstration of a wide area quantum key distribution network
- Security of continuous-variable quantum key distribution via a Gaussian de Finetti reduction
- Security of continuous-variable quantum key distribution against general attacks
- Direct and Reverse Secret-Key Capacities of a Quantum Channel
- No-Switching Quantum Key Distribution using Broadband Modulated Coherent Light
- Multidimensional reconciliation for continuous-variable quantum key distribution
- High-speed Implementation of Length-compatible Privacy Amplification in Continuous-variable Quantum Key Distribution
- Experimental study on Gaussian-modulated coherent states quantum key distribution over standard telecom fiber
- Metropolitan all-pass and inter-city quantum communication network
- Characterization of Collective Gaussian Attacks and Security of Coherent-State Quantum Cryptography
- Self-referenced continuous-variable quantum key distribution protocol
- Practical issues in quantum-key-distribution post-processing
- Generating the local oscillator "locally" in continuous-variable quantum key distribution based on coherent detection
- Field test of a continuous-variable quantum key distribution prototype
- Collective attacks and unconditional security in continuous variable quantum key distribution
- Key Reconciliation with Low-Density Parity-Check Codes for Long-Distance Quantum Cryptography
- Security bounds for continuous variables quantum key distribution
- Field Test of Classical Symmetric Encryption with Continuous Variable Quantum Key Distribution
- 1.2 GHz Balanced Homodyne Detector for Continuous-Variable Quantum Information Technology
- 6 Gbps real-time optical quantum random number generator based on vacuum fluctuation
- High speed error correction for continuous-variable quantum key distribution with multi-edge type LDPC code
- Two-way quantum cryptography at different wavelengths
- High Speed Continuous Variable Source-Independent Quantum Random Number Generation
- Parameter estimation with almost no public communication for continuous-variable quantum key distribution
- Optimal working points for continuous-variable quantum channels
Cited by in corpus (45)
- Advances in Quantum Cryptography
- Secure quantum key distribution with realistic devices
- Long-Distance Continuous-Variable Quantum Key Distribution over 202.81 km of Fiber
- Advances in Space Quantum Communications
- Continuous-variable quantum key distribution system: past, present, and future
- High-speed Gaussian modulated continuous-variable quantum key distribution with a local local oscillator based on pilot-tone-assisted phase compensation
- Quantum secret sharing using weak coherent states
- Continuous-Variable Quantum Key Distribution with Rateless Reconciliation Protocol
- Rate compatible reconciliation for continuous-variable quantum key distribution using Raptor-like LDPC codes
- Sub-Mbps key-rate continuous-variable quantum key distribution with local-local-oscillator over 100 km fiber
- Experimental passive state preparation for continuous variable quantum communications
- One-Time Shot-Noise Unit Calibration Method for Continuous-Variable Quantum Key Distribution
- Composable finite-size effects in free-space CV-QKD systems
- Discrete-modulation continuous-variable quantum key distribution with high key rate
- Practical Continuous-variable Quantum Key Distribution with Feasible Optimization Parameters
- Improving parameter estimation of entropic uncertainty relation in continuous-variable quantum key distribution
- Security analysis of practical continuous-variable quantum key distribution systems under laser seeding attack
- Finite-size effects in continuous-variable QKD with Gaussian post-selection
- Bias-free source-independent quantum random number generator
- Practical security analysis of a continuous-variable quantum random number generator with a noisy local oscillator
- Mathematical Model and Topology Evaluation of Quantum Secure Communication Network
- Long-distance continuous-variable measurement-device-independent quantum key distribution with post-selection
- Mitigation of Channel Tampering Attacks in Continuous-Variable Quantum Key Distribution
- Maximum tolerable excess noise in continuous-variable quantum key distribution and improved lower bound on two-way capacities
- Topological optimization of hybrid quantum key distribution networks
- Teleportation-based collective attacks in Gaussian quantum key distribution
- Advances in Continuous Variable Measurement-Device-Independent Quantum Key Distribution
- Continuous-variable source-device-independent quantum key distribution against general attacks
- A modified practical homodyne detector model for continuous-variable quantum key distribution: detailed security analysis and improvement by the phase-sensitive amplifier
- Equivalence of space and time-bins in DPS-QKD
- Discrete-Modulated Continuous-Variable Quantum Key Distribution in Satellite-to-Ground Communication
- Strengthening practical continuous-variable quantum key distribution systems against measurement angular error
- Security of continuous-variable quantum key distribution against canonical attacks
- Generation of True Quantum Random Numbers with On-Demand Probability Distributions via Single-Photon Quantum Walks
- Countermeasure for negative impact of practical source in continuous-variable measurement-device-independent quantum key distribution
- Zero-photon catalysis based eight-state discrete modulated measurement-device-independent continuous-variable quantum key distribution
- An introductory review of the theory of continuous-variable quantum key distribution: Fundamentals, protocols, and security
- Towards fully-fledged quantum and classical communication over deployed fiber with up-conversion module
- Detector noise in continuous-variable quantum key distribution
- Security against collective attacks for a continuous-variable quantum key distribution protocol using homodyne detection and postselection
- Continuous Variable Quantum Key Distribution with Single Quadrature Measurement at Arbitrary Reference Frame
- Increasing Interference Detection in Quantum Cryptography using the Quantum Fourier Transform
- Continuous-Variable Quantum Key Distribution with Composable Security and Tight Error Correction Bound towards Constrained-Device Implementations
- Resource-efficient energy test and parameter estimation in continuous-variable quantum key distribution
- CV-MDI-QKD: One-mode Gaussian attacks are not enough