Non-Gaussian postselection and virtual photon subtraction in continuous-variable quantum key distribution
arXiv:1601.02799 · doi:10.1103/PhysRevA.93.012310
Abstract
Photon subtraction can enhance the performance of continuous-variable quantum key distribution (CV QKD). However, the enhancement effect will be reduced by the imperfections of practical devices, especially the limited efficiency of a single-photon detector. In this paper, we propose a non-Gaussian postselection method to emulate the photon substraction used in coherent-state CV QKD protocols. The virtual photon subtraction not only can avoid the complexity and imperfections of a practical photon-subtraction operation, which extends the secure transmission distance as the ideal case does, but also can be adjusted flexibly according to the channel parameters to optimize the performance. Furthermore, our preliminary tests on the information reconciliation suggest that in the low signal-to-noise ratio regime, the performance of reconciliating the postselected non-Gaussian data is better than that of the Gaussian data, which implies the feasibility of implementing this method practically.
10 pages, 6 figures
References in corpus (16)
- Experimental demonstration of long-distance continuous-variable quantum key distribution
- 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
- Finite-size analysis of continuous-variable quantum key distribution
- Quantum information with Gaussian states
- Composable security proof for continuous-variable quantum key distribution with coherent states
- A de Finetti representation theorem for infinite dimensional quantum systems and applications to quantum cryptography
- Security of continuous-variable quantum key distribution against general attacks
- Multidimensional reconciliation for continuous-variable quantum key distribution
- Field test of a continuous-variable quantum key distribution prototype
- Improving the maximum transmission distance of continuous-variable quantum key distribution using a noiseless amplifier
- Virtual noiseless amplification and Gaussian post-selection in continuous-variable quantum key distribution
- Measurement-Based Noiseless Linear Amplification for Quantum Communication
- Gaussian Post-selection for Continuous Variable Quantum Cryptography
- Improve the Maximum Transmission Distance of Four-State Continuous Variable Quantum Key Distribution by using a Noiseless Linear Amplifier
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