Continuous-variable quantum key distribution with Gaussian source noise

Details Continuous-variable quantum key distribution with Gaussian source noise Continuous-variable quantum key distribution with Gaussian source noise

2011-01-05

arxiv.org/abs/1101.0871v2

Phys. Rev. A 83, 052304 (2011)

Physics

Quantum Physics

7 pages, 3 figures

Scientific paper

10.1103/PhysRevA.83.052304

Source noise affects the security of continuous-variable quantum key distribution (CV QKD), and is diffcult to analyze. We propose a model to characterize Gaussian source noise through introducing a neutral party (Fred) who induces the noise with a general unitary transformation. Without knowing Fred's exact state, we derive the security bounds for both reverse and direct reconciliations and show that the bound for reverse reconciliation is tight.

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