Genuine time-bin-encoded quantum key distribution over a turbulent depolarizing free-space channel
arXiv:1903.06954 · doi:10.1364/OE.27.037214
Abstract
Despite its widespread use in fiber optics, encoding quantum information in photonic time-bin states is usually considered impractical for free-space quantum communication as turbulence-induced spatial distortion impedes the analysis of time-bin states at the receiver. Here, we demonstrate quantum key distribution using time-bin photonic states distorted by turbulence and depolarization during free-space transmission. Utilizing a novel analyzer apparatus, we observe stable quantum bit error ratios of 5.32 %, suitable for generating secure keys, despite significant wavefront distortions and polarization fluctuations across a 1.2 km channel. This shows the viability of time-bin quantum communication over long-distance free-space channels, which will simplify direct fiber/free-space interfaces and enable new approaches for practical free-space quantum communication over multi-mode, turbulent, or depolarizing channels.
References in corpus (19)
- Quantum Cryptography
- The Quantum Internet
- Satellite-to-ground quantum key distribution
- Quantum Key Distribution with High Loss: Toward Global Secure Communication
- Beating the PNS attack in practical quantum cryptography
- Practical Decoy State for Quantum Key Distribution
- High-Dimensional Intra-City Quantum Cryptography with Structured Photons
- Provably-Secure and High-Rate Quantum Key Distribution with Time-Bin Qudits
- Quantum teleportation from a telecom-wavelength photon to a solid-state quantum memory
- Quantum teleportation across a metropolitan fibre network
- Quantum storage of entangled telecom-wavelength photons in an erbium-doped optical fibre
- A comprehensive design and performance analysis of LEO satellite quantum communication
- Scalable boson sampling with a single-photon device
- Distribution of high-dimensional entanglement via an intra-city free-space link
- Breaking a quantum key distribution system through a timing side channel
- Airborne demonstration of a quantum key distribution receiver payload
- Interference at the Single Photon Level Along Satellite-Ground Channels
- Studying Free-Space Transmission Statistics and Improving Free-Space QKD in the Turbulent Atmosphere
- Experimental quantum key distribution with simulated ground-to-satellite photon losses and processing limitations
Cited by in corpus (28)
- Advances in Space Quantum Communications
- The Evolution of Quantum Secure Direct Communication: On the Road to the Qinternet
- Experimental Single-Copy Entanglement Distillation
- High-fidelity spatial mode transmission through a 1-km-long multimode fiber via vectorial time reversal
- Real-time shaping of entangled photons by classical control and feedback
- Non-local temporal interferometry for highly resilient free-space quantum communication
- Performance of real-time adaptive optics compensation in a turbulent channel with high-dimensional spatial-mode encoding
- Satellite Relayed Global Quantum Communication without Quantum Memory
- Recent advances in high-dimensional mode-locked quantum frequency combs
- Finite resource performance of small satellite-based quantum key distribution missions
- Remotely Establishing Polarization Entanglement over Noisy Polarization Channels
- Single-photon interference over 8.4 km urban atmosphere: towards testing quantum effects in curved spacetime with photons
- Numerical simulations of atmospheric quantum channels
- Parallel Simulation of Quantum Networks with Distributed Quantum State Management
- Overcoming Noise Limitations in QKD with Quantum Privacy Amplification
- High-dimensional quantum key distribution with resource-efficient detection
- Numeric estimation of resource requirements for a practical polarization-frame alignment scheme for QKD
- Time-bin encoded quantum key distribution over 120 km with a telecom quantum dot source
- Time correlations in atmospheric quantum channels
- Multi-mode free-space delay interferometer with no refractive compensation elements for phase encoded QKD protocols
- Towards Fully Passive Time-Bin Quantum Key Distribution over Moving Free-Space Channels
- Time-resolved certification of frequency-bin entanglement over multi-mode channels
- Optimal filtering and generation of entangled photons for quantum applications in the presence of noise
- Photonic quantum information with time-bins: Principles and applications
- Effect of noisy channels on the transmission of mesoscopic twin-beam states
- Optimizing Continuous-Wave-Pumped Entanglement-based QKD in Noisy Environments
- Quantum Physics in Space
- Circular-beam approximation for quantum channels in a turbulent atmosphere