Experimental Demonstration of Post-Selection based Continuous Variable Quantum Key Distribution in the Presence of Gaussian Noise

Abstract

In realistic continuous variable quantum key distribution protocols, an eavesdropper may exploit the additional Gaussian noise generated during transmission to mask her presence. We present a theoretical framework for a post-selection based protocol which explicitly takes into account excess Gaussian noise. We derive a quantitative expression of the secret key rates based on the Levitin and Holevo bounds. We experimentally demonstrate that the post-selection based scheme is still secure against both individual and collective Gaussian attacks in the presence of this excess noise.

4 pages, 4 figures

References in corpus (16)

• Quantum Cryptography
• Quantum key distribution using gaussian-modulated coherent states
• Unconditional optimality of Gaussian attacks against continuous-variable QKD
• Quantum Cryptography without Switching
• Optimality of Gaussian Attacks in Continuous Variable Quantum Cryptography
• Continuous Variable Quantum Cryptography - beating the 3 dB loss limit
• No-Switching Quantum Key Distribution using Broadband Modulated Coherent Light
• Virtual Entanglement and Reconciliation Protocols for Quantum Cryptography with Continuous Variables
• Continuous-variable quantum cryptography is secure against non-gaussian attacks
• Collective attacks and unconditional security in continuous variable quantum key distribution
• Security bounds for continuous variables quantum key distribution
• Controlling excess noise in fiber optics continuous variables quantum key distribution
• A practical limitation for continuous-variable quantum cryptography using coherent states
• Efficient-phase-encoding protocols for continuous-variable quantum key distribution using coherent states and postselection
• Security of Quantum Key Distribution with Coherent States and Homodyne Detection
• Witnessing effective entanglement in a continuous variable prepare&measure setup and application to a QKD scheme using postselection

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