Dense-coding quantum key distribution based on continuous-variable entanglement

Abstract

We proposed a scheme of continuous-variable quantum key distribution, in which the bright Einstein-Podolsky-Rosen entangled optical beams are utilized. The source of the entangled beams is placed inside the receiving station, where half of the entangled beams are transmitted with round trip and the other half are retained by the receiver. The amplitude and phase signals modulated on the signal beam by the sender are simultaneously extracted by the authorized receiver with the scheme of the dense-coding correlation measurement for continuous quantum variables, thus the channel capacity is significantly improved. Two kinds of possible eavesdropping are discussed. The mutual information and the secret key rates are calculated and compared with those of unidirectional transmission schemes.

References in corpus (29)

• Quantum Cryptography
• Continuous variable quantum cryptography using coherent states
• Quantum key distribution using gaussian-modulated coherent states
• Continuous variable quantum cryptography
• Quantum Cryptography without Switching
• Tripartite Quantum State Sharing
• Quantum cryptography with squeezed states
• Dense Coding for Continuous Variables
• Quantum Dense Coding Exploiting Bright EPR Beam
• Quantum Distribution of Gaussian Keys with Squeezed States
• Entanglement as precondition for secure quantum key distribution
• Quantum communication between atomic ensembles using coherent light
• Experimental Free-Space Distribution of Entangled Photon Pairs over a Noisy Ground Atmosphere of 13km
• Secure quantum key distribution using squeezed states
• No-Switching Quantum Key Distribution using Broadband Modulated Coherent Light
• Experimental Demonstration of Unconditional Entanglement Swapping for Continuous Variables
• Intrinsic-Stabilization Uni-Directional Quantum Key Distribution Between Beijing and Tianjin
• Quantum cryptography with a predetermined key, using continuous variable Einstein-Podolsky-Rosen correlations
• Long distance entanglement based quantum key distribution
• Collective attacks and unconditional security in continuous variable quantum key distribution
• Quantum key distribution with bright entangled beams
• Quantum versus Classical Domains for Teleportation with Continuous Variables
• Security of Continuous Variable Quantum Cryptography
• Security bounds for continuous variables quantum key distribution
• Single-photon interference over 150-km transmission using silica-based integrated-optic interferometers for quantum cryptography
• 7 dB quadrature squeezing at 860 nm with periodically-poled KTiOPO4
• Quantum Communication with Correlated Nonclassical States
• Quantum dense key distribution
• Security of Quantum Key Distribution with Coherent States and Homodyne Detection

Cited by in corpus (4)

• Continuous variable quantum key distribution based on optical entangled states without signal modulation
• Generation and structuring of multipartite entanglement in Josephson parametric system
• Advances in Continuous Variable Measurement-Device-Independent Quantum Key Distribution
• Dependence of quantum correlations of twin beams on pump finesse of optical parametric oscillator