基于三粒子非对称纠缠信道的可控密集编码

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。

Controlled dense coding using three-particle in the non-symmetric quantum state

A scheme of controlled dense coding is proposed by using non-symmetric quantum channel in dimensional entangled state. The collapse of the state and the entanglement between Alice and Bob are controlled by Charlie’s local measurement on his particle in two dimension. Then the dimensional non-symmetric quantum channel is controlled. It can be seen that the average amount of transmitted information of dense coding is controlled by Charlie’s measurement angle. One can find that the average amount of information is more than 2 bits by using maximally entangled state in the non-symmetric quantum channel. Thus, this scheme is high-efficiency. In the case the entanglement is non-maximally, the transmitted information is determined by the measurement angle and the coefficient of the entangled state.