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中文摘要：
在这份报纸，我们理论上证明光地的 Gaussian 量不一致状态能被用来完成连续变量(CV ) 量钥匙分发(QKD ) 。计算证明那把秘密钥匙能对纠缠 cloner 攻击与一个 Gaussian 量不一致状态被提取。秘密的关键率与与 Gaussian 量不一致状态为 CV QKD 增加量不一致被增加。尽管计算结果用 Gaussian 量不一致指出那秘密的关键率，说在一样的精力水平用挤压的状态和协调状态是比那低的，我们证明 Gaussian 量不一致，没有纠纷的存在，仅仅包含量关联，可以为认识到 CV QKD 提供一个新资源。
英文摘要：
In this paper, we theoretically prove that the Gaussian quantum discord state of optical field can be used to complete continuous variable （CV） quantum key distri- bution （QKD）. The calculation shows that secret key can be distilled with a Gaussian quantum discord state against entangling cloner attack. Secret key rate is increased with the increasing of quantum discord for CV QKD with the Gaussian quantum discord state. Although the calculated results point out that secret key rate using the Gaussian quantum discord state is lower than that using squeezed state and coherent state at the same energy level, we demonstrate that the Gaussian quantum discord, which only involving quantum correlation without the existence of entanglement, may provide a new resource for realizing CV QKD.
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