Improvement of two-way continuous-variable quantum key distribution using optical amplifiers
arXiv:1307.7590 · doi:10.1088/0953-4075/47/3/035501
Abstract
The imperfections of a receiver's detector affect the performance of two-way continuous-variable quantum key distribution protocols and are difficult to adjust in practical situations. We propose a method to improve the performance of two-way continuous-variable quantum key distribution by adding a parameter-adjustable optical amplifier at the receiver. A security analysis is derived against a two-mode collective entangling cloner attack. Our simulations show that the proposed method can improve the performance of protocols as long as the inherent noise of the amplifier is lower than a critical value, defined as the tolerable amplifier noise. Furthermore, the optimal performance can approach the scenario where a perfect detector is used.
14 pages, 7 figures
References in corpus (9)
- Gaussian Quantum Information
- Experimental demonstration of long-distance continuous-variable quantum key distribution
- Quantum key distribution over 25 km with an all-fiber continuous-variable system
- 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
- Improvement of continuous-variable quantum key distribution systems by using optical preamplifiers
- Demonstration of a quantum nondemolition sum gate
- Security of a new two-way continuous-variable quantum key distribution protocol
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- Security-proof framework for two-way Gaussian quantum-key-distribution protocols
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- A modified practical homodyne detector model for continuous-variable quantum key distribution: detailed security analysis and improvement by the phase-sensitive amplifier