Long distance measurement-device-independent quantum key distribution with coherent-state superpositions
arXiv:1409.5728 · doi:10.1364/OL.39.005451
Abstract
Measurement-device-independent quantum key distribution (MDI-QKD) with decoy-state method is believed to be securely applied to defeat various hacking attacks in practical quantum key distribution systems. Recently, the coherent-state superpositions (CSS) have emerged as an alternative to single-photon qubits for quantum information processing and metrology. Here, in this Letter, CSS are exploited as the source in MDI-QKD. We present an analytical method which gives two tight formulas to estimate the lower bound of yield and the upper bound of bit error rate. We exploit the standard statistical analysis and Chernoff bound to perform the parameter estimation. Chernoff bound can provide good bounds in the long distance MDI-QKD. Our results show that with CSS, both the security transmission distance and secure key rate are significantly improved compared with those of the weak coherent states in the finite-data case.
References in corpus (6)
- Hacking commercial quantum cryptography systems by tailored bright illumination
- Generation of a superposition of odd photon number states for quantum information networks
- Fault-tolerant linear optical quantum computing with small-amplitude coherent states
- Measurement-device-independent quantum key distribution over 200 km
- Quantum Eavesdropping without Interception: An Attack Exploiting the Dead Time of Single Photon Detectors
- Statistical fluctuation analysis for measurement-device-independent quantum key distribution
Cited by in corpus (5)
- Breaking the Rate-Loss Bound of Quantum Key Distribution with Asynchronous Two-Photon Interference
- Measurement-device-independent quantum key distribution of multiple degrees of freedom of a single photon
- Finite-key Analysis for Quantum Conference Key Agreement with Asymmetric Channels
- Security of quantum key distribution with multiphoton components
- Modeling and Simulation of Practical Quantum Secure Communication Network