Atmospheric effects on continuous-variable quantum key distribution
arXiv:1804.04879 · doi:10.1088/1367-2630/aad9c4
Abstract
Compared to fiber continuous-variable quantum key distribution (CVQKD), atmospheric link offers the possibility of a broader geographical coverage and more flexible transmission.However, there are many negative features of the atmospheric channel that will reduce the achievable secret key rate, such as beam extinction and a variety of turbulence effects. Here we show how these factors affect performance of CVQKD, by considering our newly derived key rate formulas for fading channels,which involves detection imperfections, thus form a transmission model for CVQKD. This model can help evaluate the feasibility of experiment scheme in practical applications.We found that performance deterioration of horizontal link within the boundary layer is primarily caused by transmittance fluctuations (including beam wandering, broadening, deformation, and scintillation),while transmittance change due to pulse broadening under weak turbulence is negligible. Besides,we also found that communication interruptions can also cause a perceptible key rate reduction when the transmission distance is longer, while phase excess noise due to arrival time fluctuations requires new compensation techniques to reduce it to a negligible level. Furthermore, it is found that performing homodyne detection enables longer transmission distances, whereas heterodyne allows higher achievable key rate over short distances.
arXiv comment14 pages, 16 figures
References in corpus (20)
- Quantum Cryptography
- Gaussian Quantum Information
- Satellite-to-ground quantum key distribution
- Continuous variable quantum cryptography using coherent states
- Quantum key distribution using gaussian-modulated coherent states
- Sinc approximation of algebraically decaying functions
- Quantum Cryptography without Switching
- Security of continuous-variable quantum key distribution via a Gaussian de Finetti reduction
- Security of continuous-variable quantum key distribution against general attacks
- Improvement of continuous-variable quantum key distribution systems by using optical preamplifiers
- High-fidelity transmission of entanglement over a high-loss freespace channel
- Generating the local oscillator "locally" in continuous-variable quantum key distribution based on coherent detection
- Atmospheric Quantum Channels with Weak and Strong Turbulence
- Quantum-limited measurements of optical signals from a geostationary satellite
- Entanglement of Gaussian states and the applicability to quantum key distribution over fading channels
- Atmospheric continuous-variable quantum communication
- Feasibility of free space quantum key distribution with coherent polarization states
- Free-space quantum links under diverse weather conditions
- Atmospheric Channel Characteristics for Quantum Communication with Continuous Polarization Variables
- Witnessing effective entanglement in a continuous variable prepare&measure setup and application to a QKD scheme using postselection
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- Fading channel estimation for free-space continuous-variable secure quantum communication
- Free-space continuous-variable quantum key distribution of unidimensional Gaussian modulation using polarized coherent-states in urban environment
- Composable finite-size effects in free-space CV-QKD systems
- Feasibility Assessment For Practical Continuous Variable Quantum Key Distribution Over The Satellite-to-Earth Channel
- Analysis of satellite-to-ground quantum key distribution with adaptive optics
- Atmospheric effects on satellite-to-ground quantum key distribution using coherent states
- Simple and loss-tolerant free-space QKD using a squeezed laser
- Numerical simulations of atmospheric quantum channels
- Analysis for satellite-based high-dimensional extended B92 and high-dimensional BB84 quantum key distribution
- Use of a Local Local Oscillator for the Satellite-to-Earth Channel
- Long-distance free-space quantum key distribution with continuous variables
- Phase Correction using Deep Learning for Satellite-to-Ground CV-QKD
- Satellite-based communication for phase-matching measurement-device-independent quantum key distribution
- Time correlations in atmospheric quantum channels
- Finite and Asymptotic Key Analysis for CubeSat-Based BB84 QKD with Elliptical Beam Approximation
- Quantum Wavefront Correction via Machine Learning for Satellite-to-Earth CV-QKD
- Tagging idea in continuous variable quantum key distribution and its application
- Protecting Classical-Quantum Signals in Free Space Optical Channels
- Circular-beam approximation for quantum channels in a turbulent atmosphere