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基于三粒子非对称纠缠信道的可控密集编码

, PP. 305-311

Keywords: 量子信息,密集编码,非对称信道,控制,信息量,幺正变换

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Abstract:

提出一种新型的基于三粒子维非对称纠缠量子信道可控密集编码方案。控制者(Charlie)对其手中2维粒子进行局域测量控制信息发送者(Alice)和接收者(Bob)量子态塌缩,调控Alice和Bob量子态纠缠,实现Alice和Bob维非对称量子信道纠缠调控。计算了Alice和Bob非对称密集编码平均信息传送量,分析表明,Charlie通过调节测量角的大小可以控制Alice和Bob平均信息传送量。利用三粒子最大纠缠程度的维非对称纠缠量子信道,Charlie可以控制Alice和Bob密集编码传送信息量高于2比特,方案是高效的;对于非最大纠缠程度的量子信道,传送信息量受到Charlie测量角和三粒子量子态纠缠系数共同调控。

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