Noiseless Linear Amplifiers in Entanglement-Based Continuous-Variable Quantum Key Distribution

Abstract

We propose a method to improve the performance of two entanglement-based continuous-variable quantum key distribution protocols using noiseless linear amplifiers. The two entanglement-based schemes consist of an entanglement distribution protocol with an untrusted source and an entanglement swapping protocol with an untrusted relay. Simulation results show that the noiseless linear amplifiers can improve the performance of these two protocols, in terms of maximal transmission distances, when we consider small amounts of entanglement, as typical in realistic setups.

Special issue on Quantum Cryptography

References in corpus (19)

• Device-independent security of quantum cryptography against collective attacks
• Unconditional optimality of Gaussian attacks against continuous-variable QKD
• Quantum key distribution over 25 km with an all-fiber continuous-variable system
• Optimality of Gaussian Attacks in Continuous Variable Quantum Cryptography
• Quantum information with Gaussian states
• A de Finetti representation theorem for infinite dimensional quantum systems and applications to quantum cryptography
• Continuous Variable Quantum Cryptography using Two-Way Quantum Communication
• Security of continuous-variable quantum key distribution against general attacks
• Direct and Reverse Secret-Key Capacities of a Quantum Channel
• Characterization of Collective Gaussian Attacks and Security of Coherent-State Quantum Cryptography
• Continuous-variable quantum key distribution protocols over noisy channels
• Improving the maximum transmission distance of continuous-variable quantum key distribution using a noiseless amplifier
• Continuous-variable measurement-device-independent quantum key distribution using squeezed states
• Measurement-Based Noiseless Linear Amplification for Quantum Communication
• Continuous-Variable Quantum Key Distribution with Entanglement in the Middle
• Gaussian Post-selection for Continuous Variable Quantum Cryptography
• Continuous-variable quantum cryptography with an untrusted relay: Detailed security analysis of the symmetric configuration
• Device-Independent Quantum Cryptography for Continuous Variables
• Theoretical Analysis of an Ideal Noiseless Linear Amplifier for Einstein-Podolsky-Rosen Entanglement Distillation