Performance analysis of continuous-variable quantum key distribution using non-Gaussian states
arXiv:2112.10128 · doi:10.1007/s11128-022-03645-z
Abstract
In this study, we analyze the efficiency of a protocol with discrete modulation of continuous variable non-Gaussian states, the coherent states having one photon added and then one photon subtracted (PASCS). We calculate the secure key generation rate against collective attacks using the fact that Eve's information can be bounded based on the protocol with Gaussian modulation, which in turn is unconditionally secure. Our results for a four-state protocol show that the PASCS always outperforms the equivalent coherent states protocol under the same environmental conditions. Interestingly, we find that for the protocol using discrete-modulated PASCS, the noisier the line, the better will be its performance compared to the protocol using coherent states. Thus, our proposal proves to be advantageous for performing quantum key distribution in non-ideal situations.
arXiv comment12 pages, 5 figures
References in corpus (22)
- Continuous variable quantum cryptography using coherent states
- Quantum key distribution using gaussian-modulated coherent states
- 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
- Unconditional security proof of long-distance continuous-variable quantum key distribution with discrete modulation
- Continuous Variable Quantum Cryptography - beating the 3 dB loss limit
- A high-fidelity noiseless amplifier for quantum light states
- Virtual Entanglement and Reconciliation Protocols for Quantum Cryptography with Continuous Variables
- Continuous-variable quantum key distribution protocols with a non-Gaussian modulation
- Collective attacks and unconditional security in continuous variable quantum key distribution
- 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
- Explicit asymptotic secret key rate of continuous-variable quantum key distribution with an arbitrary modulation
- Gaussian Post-selection for Continuous Variable Quantum Cryptography
- Security of quantum cryptography using balanced homodyne detection
- Reverse reconciliation protocols for quantum cryptography with continuous variables
- Discrete-modulation continuous-variable quantum key distribution enhanced by quantum scissors
- Continuous variable B92 quantum key distribution protocol using single photon added and subtracted coherent states
- Finding and breaking the realistic rate-distance limit of continuous variable quantum key distribution
- Quantum Key Distribution using Continuous-variable non-Gaussian States