Long-distance practical quantum key distribution by entanglement swapping

Abstract

We develop a model for practical, entanglement-based long-distance quantum key distribution employing entanglement swapping as a key building block. Relying only on existing off-the-shelf technology, we show how to optimize resources so as to maximize secret key distribution rates. The tools comprise lossy transmission links, such as telecom optical fibers or free space, parametric down-conversion sources of entangled photon pairs, and threshold detectors that are inefficient and have dark counts. Our analysis provides the optimal trade-off between detector efficiency and dark counts, which are usually competing, as well as the optimal source brightness that maximizes the secret key rate for specified distances (i.e. loss) between sender and receiver.

14 pages, 9 figures; published in Optics Express

References in corpus (37)

• Quantum Cryptography
• The Security of Practical Quantum Key Distribution
• Long-distance quantum communication with atomic ensembles and linear optics
• Simple Proof of Security of the BB84 Quantum Key Distribution Protocol
• Decoy State Quantum Key Distribution
• Quantum Key Distribution with High Loss: Toward Global Secure Communication
• Beating the PNS attack in practical quantum cryptography
• Free-Space distribution of entanglement and single photons over 144 km
• Security Aspects of Practical Quantum Cryptography
• Practical Decoy State for Quantum Key Distribution
• Security against individual attacks for realistic quantum key distribution
• Broadband waveguide quantum memory for entangled photons
• Kinetic-inductance-limited reset time of superconducting nanowire photon counters
• Experimental Quantum Key Distribution with Decoy States
• Maximum efficiency of a linear-optical Bell-state analyzer
• Entangling Independent Photons by Time Measurement
• Quantum key distribution with entangled photon sources
• Femtosecond Time-Bin Entangled Qubits for Quantum Communication
• Security of Quantum Key Distribution with Entangled Photons Against Individual Attacks
• Noise-free high-efficiency photon-number-resolving detectors
• Robust creation of entanglement between remote memory qubits
• A decoy-state protocol for quantum cryptography with 4 intensities of coherent states
• Long distance quantum teleportation in a quantum relay configuration
• Long distance entanglement swapping with photons from separated sources
• Secure quantum key distribution with an uncharacterized source
• Squashing Models for Optical Measurements in Quantum Communication
• Quantum relays and noise suppression using linear optics
• A fast and robust approach to long-distance quantum communication with atomic ensembles
• Quantum Relays for Long Distance Quantum Cryptography
• Full polarization control for fiber optical quantum communication systems using polarization encoding
• Two independent photon pairs versus four-photon entangled states in parametric down conversion
• Proof-of-Concept of Real-World Quantum Key Distribution with Quantum Frames
• Entanglement verification with realistic measurement devices via squashing operations
• Quantum states prepared by realistic entanglement swapping
• Quantum Key Distribution over Probabilistic Quantum Repeaters
• Memory Imperfections in Atomic Ensemble-based Quantum Repeaters
• Fast Entanglement Distribution with Atomic Ensembles and Fluorescent Detection

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• Remote entanglement distribution in a quantum network via multinode indistinguishability of photons
• Information communicated by entangled photon pairs
• Efficient quantum repeater in perspectives of both entanglement concentration rate and LOCC complexity
• Practical long-distance quantum key distribution through concatenated entanglement swapping with parametric down-conversion sources
• Heralded generation of entanglement with photons
• Hong-Ou-Mandel Interference with a Coexisting Clock using Transceivers for Synchronization over Deployed Fiber
• Nonlocal subpicosecond delay metrology using spectral quantum interference
• Parametric separation of symmetric pure quantum states
• Efficient Dicke state generation in a network of lossy channels
• Efficiencies of Quantum Optical Detectors