A generalized entanglement-based scheme for Gaussian-modulated coherent state continuous-variable quantum key distribution. (29th May 2015)

• Record Type: Journal Article
• Authors: Wang, Tianyi; Yu, Song; Zhang, Yi-Chen; Gu, Wanyi
• Is Part Of: Journal of physics. Volume 48:Number 13(2015:Jul. 01)
• Publication Date: 2015-05-29
• Subjects: continuous-variable quantum key distribution -- mixed-entangled state -- Gaussian source noise; Atoms -- Periodicals; Molecules -- Periodicals; Optics -- Periodicals; Nuclear physics -- Periodicals; 539.6
• DOI: 10.1088/0953-4075/48/13/135504
• Languages: English
• ISSNs: 0953-4075

Abstract

Abstract: The source noise introduced in quantum state preparation of continuous-variable quantum key distribution (CVQKD) needs to be adequately modeled to evaluate its impact. For this purpose, we generalize the entanglement-based scheme of coherent state CVQKD from pure entangled states to mixed entangled states. In the proposed scheme, the source noise is generated via non-maximal entanglement. We prove that the proposed scheme is equivalent to a practical setup with Gaussian source noise. Furthermore, the equivalence is verified by simulation results.