Enhancing discrete-modulated continuous-variable measurement-device-independent quantum key distribution via quantum catalysis
arXiv:2004.10432
Abstract
The discrete modulation can make up for the shortage of transmission distance in measurement-device-independent continuous-variable quantum key distribution (MDI-CVQKD) that has an unique advantage against all side-channel attacks but also challenging for the further performance improvement. Here we suggest a quantum catalysis (QC) approach for enhancing the performance of the discrete-modulated (DM) MDI-CVQKD in terms of the achievable secret key rate and lengthening the maximal transmission distance. The numerical simulation results show that the QC-based MDI-CVQKD with discrete modulation that involves a zero-photon catalysis (ZPC) operation can not only obtain a higher secret key rate than the original DM protocol, but also contributes to the reasonable increase of the corresponding optimal variance. As for the extreme asymmetric and symmetric cases, the secret key rate and maximal transmission distance of the ZPC-involved DM MDI-CVQKD system can be further improved under the same parameters. This approach enables the system to tolerate lower reconciliation efficiency, which will promote the practical implementations with state-of-art technology.
arXiv comment11pages,5figures
References in corpus (29)
- The Security of Practical Quantum Key Distribution
- Gaussian Quantum Information
- Continuous variable quantum cryptography using coherent states
- General Benchmarks for Quantum Repeaters
- Fundamental Limits of Repeaterless Quantum Communications
- Secure Quantum Key Distribution
- Unconditional optimality of Gaussian attacks against continuous-variable QKD
- Provably Secure and Practical Quantum Key Distribution over 307 km of Optical Fibre
- Optimality of Gaussian Attacks in Continuous Variable Quantum Cryptography
- Unconditional security proof of long-distance continuous-variable quantum key distribution with discrete modulation
- Extremality of Gaussian quantum states
- Continuous Variable Quantum Cryptography using Two-Way Quantum Communication
- Multidimensional reconciliation for continuous-variable quantum key distribution
- Continuous-Variable Measurement-Device-Independent Quantum Key Distribution
- Local oscillator fluctuation opens a loophole for Eve in practical continuous-variable quantum-key-distribution systems
- Quantum-optical catalysis: generating "Schroedinger kittens" by means of linear optics
- Continuous-variable quantum key distribution protocols with a non-Gaussian modulation
- Virtual noiseless amplification and Gaussian post-selection in continuous-variable quantum key distribution
- Continuous-variable quantum key distribution with non-Gaussian quantum catalysis
- Continuous-variable measurement-device-independent quantum key distribution: Composable security against coherent attacks
- Continuous-variable measurement-device-independent quantum key distribution with photon subtraction
- Finite size analysis of measurement device independent quantum cryptography with continuous variables
- Continuous-variable measurement-device-independent multipartite quantum communication
- Long-distance continuous-variable measurement-device-independent quantum key distribution with discrete modulation
- Continuous-variable measurement-device-independent quantum key distribution with virtual photon subtraction
- Finite-size analysis of continuous-variable measurement-device-independent quantum key distribution
- Entanglement Reactivation in Separable Environments
- Composable security analysis of continuous-variable measurement-device-independent quantum key distribution with squeezed states for coherent attacks
- Improved Four-state Continuous-variable Quantum Key Distribution with Long Secure Distance